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Davele posted 12-08-2012 10:06 AM ET (US)
Hello. A newbie here. I have been reading all I can find on the ENERTIA propeller and am trying to determine what pitch I should choose for my particular application. I'm running a 2013 23-foot sport cuddy weighing approximately 3,670 pounds dry with 5.0 260-HP Mercruiser, 1.62:1 ratio, 19-inch Vengeance propeller. This give 5,000 RPM at full throttle and (an inconsistent) 47 -MPH. In switching to the Enertia what pitch would you guys recommend? I've heard swapping pitch for pitch but I've also heard that the ENERTIA spins a little faster. My goal is optimum top end. Any and all suggetions would be greatly appreciated. Thanks Dave.
jimh posted 12-08-2012 12:03 PM ET (US)
[Separated from another discussion]
jimh posted 12-08-2012 07:38 PM ET (US)
I don't have any first-hand experience with the ENERTIA, but the general impression I have is that with the same pitch as other propellers the ENERTIA will tend to allow the engine to a higher RPM, perhaps a couple hundred, and this is where the speed increase will occur. A top speed of 47-MPH is already rather good, at least for me.
Davele posted 12-09-2012 08:24 AM ET (US)
That's exactly what I heard about the Enertia also.I was just concerned that with the extra RPM that I would start bumping the rev limiter which is factory set at 5150.I have been told that basically just sidestepping to the 19 would get me real close to 50 MPH.I wondered also if I stepped up to a 20 inch or even a 21 inch,that that may alleviate the RPM problem and get me a tad more speed yet.Thanks for your response.
Commander Coo1 posted 12-10-2012 02:30 PM ET (US)
It looks like with the Vengeance you are slipping about 15% at WOT. A lot of reports I have read with people using the Enertia, they generally end up with slip at around 9-10% from what I have read. If that was the case, you may see 48-49mph at 4900-5000RPM would be my guess. I am by no means an expert, I just am doing a prop hunt myself and have looked a lot at the enertia. I would not expect the Enertia to turn more RPMs than the vengeance, most people that say the Enertia turns more RPMs are comparing it to the mirage, tempest, rev4, and other similar large propellers. The Enertia's diameter shrinks quite a bit when it is in 19p, so it would be interesting to see how well it can carry a the load of a 23' cuddy.
I have spend a lot of time (probably too much time) reading on propgods.com http://www.google.com/search?hl=en&tbo=d&rlz=1C1GGGE_enBS413BS413& biw=1280&bih=933&q=site%3Apropgods.com+vengeance+vs+enertia+& oq=site%3Apropgods.com+vengeance+vs+enertia+&gs_l=serp.3...2577.7136.0. 7353.5.5.0.0.0.0.57.262.5.5.0.les%3B..0.0...1c.1.mTXQfrmG4kI
It seems the more often than not, they recommend a large propeller like the Mirage or Thunderbolt for larger and heavier boats. I used to have a Vengeance, and it was the worst prop I have tried on my boat by far. Good luck, and keep us posted--James
Davele posted 12-10-2012 07:10 PM ET (US)
From what I've read about the Vengeance, if a person were upgrading to a stainless steel propeller from an aluminum, then the Vengeance is the right choice--an entry level SS propeller. The Mirage was recommended to me, but was told I might only see a roughly 1-MPH gain with an improvement in midrange.
Is there any harm in running an engine at the low end of the RPM range as long as your not lugging the engine? It has always been said that you should be as close to the upper end of the range. My range is 4,600 to 5,000. And yes, I too have been all over PropGods. Thanks for your thoughts Jim. Keep'em coming and I'll keep playing with the prop selector.
jimh posted 12-10-2012 10:24 PM ET (US)
Read my article on the propeller power curve to understand how running a higher-pitch propeller affects engine reserve power and accelleration.
http://continuouswave.com/whaler/reference/propellerPowerCurve.html
Davele posted 12-13-2012 09:45 PM ET (US)
Hello Jim and thank you for that great information.It's funny you did your test with a Revolution 4 prop.The manufacturer of my boat put a Rev 4 on when we picked it up new.I THINK it was a 19 inch.When I ran the boat the first time at WOT I got right around 42 MPH at roughly 4200 PRM.In escence I think maybe I don't have enough horsepower to turn a prop that large.Is that a correct assumption? Also according to the Speed Prediction Formula,when I factor in my boat weight and with a Hull factor of 180 it is a tad higher(47.9)compared with the performance that I'm achieving(46.76)with my current prop.Using hull factor 172 I get 45.8 MPH.So in conclusion based on what I've learned from you all I think 50 (or just shy of) is about all I'm going to be able achieve by switching to an Enertia and I'm happy with that.I hope I wasn't to much of a pain.Just trying to learn as much about props as I can.Definitely an interesting subject.Thanks also to Commander Cool and Tom for your valuable help.I really appreciate it.Lets hope for a quick return to Summer so we can all get back on our boats and I can get my new prop!Sincerely,Dave.
martyn1075 posted 12-19-2012 08:50 PM ET (US)
I have no complaints with my ENERTIA props. They are fairly light as well. Good investment I think although hard at first to stomach $500-1000 depending on where you shop for a prop. I think you get what you pay for in this world it seems. However there are good buys out there at times if you are willing to wait and pounce.
Martyn
Tom W Clark posted 12-21-2012 01:01 PM ET (US)

quote:
...if a person were upgrading to a stainless steel propeller from an aluminum, then the Vengeance is the right choice
No, the Vengeance is not a good fit for a 23 foot cuddy with sterndrive power. You want a propeller with more blade area like the Mercury MIRAGEplus or the Revolution 4. The Enertia would be worth a try as well too; the lower pitch Enertias have rather large diameters and a lot of blade area.
Davele posted 12-23-2012 02:25 PM ET (US)
Tom,I stand corrected.According to Mercurys' website they call the Vengeance prop a general purpose prop designed to provide increased top speed,aceleration and durability over a comparable aluminum prop.The Vengeance does just OK on my Cuddy but I feel that there is more speed to be had.That's why I'm looking so strongly at the Enertia.Again,thanks all and keep the recommendations(ie pitch,etc.)coming.
martyn1075 posted 12-23-2012 07:22 PM ET (US)
As far as performance I have determined a 2mph difference with the Enertia props. Personally I don't really care too much I'm not a speed demon but its fairly accurate vs the mirage plus props that were also included with the boat. I really like the hole shot with these props as well turning at high speeds the performance is just brilliant. I thinks it's a combination between boat design engine hp and engine setup that makes the correct prop work not just the prop.
Martyn
Davele posted 12-30-2012 12:35 PM ET (US)
Hello Martyn and thanks for your input.A 2MPH gain is quite good and I would be very happy with that.I agree that hull design,weight and horsepower are a factor on how well a particular boat performs. Yes the deals are out there especially when the Enertia first came on the market at over $600.00.I've seen them on E-bay for $498.00.Just want to make sure I determine the correct pitch before I pull the trigger.I've learned alot from this forum and others and I thank you all for your help and input.I will post my results ASAP next Spring.I am excited about the possible results.
L H G posted 12-30-2012 02:08 PM ET (US)
Buy your new Mercury props here, like I do. (scroll down) Mirage Plus $379, Enertia $449 with hub and shipping, no sales tax. http://jacosmarine.com/ I have yet to find better pricing on the web, unless you can find a decent used one on Ebay.
You may also be able to find an internet seller who has the LH prop on sale, since they are harder to get rid of.
Commander Coo1 posted 01-01-2013 09:37 PM ET (US)
I just ordered one from Propgods.com, it was 499, but he offers a lot of help with prop selection whether you buy from him or not. You can also swap it for $35 if you need a different style or pitch, he also sends out test props for i think $30 plus shipping.
Davele posted 01-07-2013 07:05 PM ET (US)
L H G,those are some great prices on props.My dealer said not to buy anything just yet because he will be able to swap out my Vengeance for an Enertia that he said is what I needed all along.Unfortunately we are under the grip of Winter so I'm playing the waiting game till Spring.As long as he's willing to keep switching till I'm satisfied I'm OK with it.Problem is he's 3 hours away.James,I have been in contact with Propgods and if things don't work out with the dealer I may go that route.I just don't want to be off the water to long this Spring.Thanks.
Commander Coo1 posted 01-14-2013 11:26 PM ET (US)
My Enertia came in and and compared to the Mirage plus, I picked up 4.7 mph (38mph to 42.7mph), and 325RM at WOT. in the mirage's deffence, it was slightly used in 8/10 condition.
Davele posted 01-29-2013 06:15 AM ET (US)
That is an impressive increase in speed James.You have to be very happy.What make and model boat do you have your Enertia on? What was low end manueverablity like with the Enertia? And how did your boat come on plane? Sorry for all the Questions but you've got me pumped.Dave
Commander Coo1 posted 01-29-2013 08:59 PM ET (US)
Dave,
I am quite happy with the Enertia 15x15, mostly because it gets my engine up to the proper RPM range finally. My boat is a 1997 Outrage 20 (post classic hull) powered by a 2012 E-TEC 175. I was very impressed at the speed increase from the Mirage plus, it was a huge jump. other props i have tried like the BRP Rebel and OMC SST got me speeds of about 41mph. Not quite as fast as the Enertia. The Enertia has very good low speed maneuverability, I may like its characteristics better than the Rebel and Mirage on my setup. Holeshot is night and day comparing other props i have tried to the Enertia. Even though the Enertia is actually heavier, it spins up quickly and gets my boat up in a hurry. The only downside to this prop is its low speed planing ability, the boat seems require a higher engine RPM and boat speed to maintain a steady plane.
When I tuck the motor in, put tabs down and try to stay slow I tend to burn quite a bit more fuel than other style props. maybe .3-.4mpg lower at this speed. at 20 mph before I might get 3.3 and now i get 3.0 or so when loaded to fish.
On the flip side, it achieves .3-.4mpg better at a fast cruise. at 32mph I get about 3.3 where i used to get 3.0. So it all evens out i think.
On a rough day the Rebel or Mirage would be more fuel efficient than the Enertia.
The Enertia has definitely made my boat feel more "alive!" If you have any more questions don't hesitate to ask. I also have another thread that compares all the props that I tested on my boat that is on this site also.
Davele posted 02-01-2013 04:13 PM ET (US)
Thanks James.Good to hear you are happy with your purchase.Could you possible direct me to your thread comparing props? Thanks again for sharing your info.
Commander Coo1 posted 02-01-2013 05:29 PM ET (US)
http://continuouswave.com/ubb/Forum4/HTML/007839.html
I hope that helps you out Dave! I also mentioned a Vengeance propeller that I tried, it did not work well at all for me.
-James
Davele posted 10-20-2013 09:22 PM ET (US)
Hi guys. Been a while since I posted but it took this long for me to aquire an Enertia prop. Finally landed one from a marina in Wisconsin. My results:
Conditions were minimal lake chop, humidity around 57%, light winds. I made three runs, one against the wind and got no increase in speed. Failed to check RPM's.
Second run was with the wind and got 47.5/48 MPH. Baffled me as to why I wasn't seeing any noticeable increase in speed until I checked the RPM's on second run: 4,600 to 4,650-RPM.
Third run was again with the wind and got 48.17. All speeds were GPS.
Planing times were noticebly better than my Vengeance and low speed control was very good. I may have seen 50 had I been able to spin the prop to 5,000-RPM. That's what Ken said at Propgods, also.
I was ready to make the purchase but unfortunately the speed just wasn't there. [I plan] to send-in my Vengeance over the Winter to have some cup put on the tips and see how that works. That may be the end of my options. I guess I'll just have to reserve myself to the fact that I won't see 50. Oh well, at least I'll be on the pond! Thanks for all the great input thus far. If my next move sees any improvement I'll post back up.--Dave.

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Author	Topic: ENERTIA replacing VENGEANCE
Davele	posted 12-08-2012 10:06 AM ET (US) Hello. A newbie here. I have been reading all I can find on the ENERTIA propeller and am trying to determine what pitch I should choose for my particular application. I'm running a 2013 23-foot sport cuddy weighing approximately 3,670 pounds dry with 5.0 260-HP Mercruiser, 1.62:1 ratio, 19-inch Vengeance propeller. This give 5,000 RPM at full throttle and (an inconsistent) 47 -MPH. In switching to the Enertia what pitch would you guys recommend? I've heard swapping pitch for pitch but I've also heard that the ENERTIA spins a little faster. My goal is optimum top end. Any and all suggetions would be greatly appreciated. Thanks Dave.
jimh	posted 12-08-2012 12:03 PM ET (US) [Separated from another discussion]
jimh	posted 12-08-2012 07:38 PM ET (US) I don't have any first-hand experience with the ENERTIA, but the general impression I have is that with the same pitch as other propellers the ENERTIA will tend to allow the engine to a higher RPM, perhaps a couple hundred, and this is where the speed increase will occur. A top speed of 47-MPH is already rather good, at least for me.
Davele	posted 12-09-2012 08:24 AM ET (US) That's exactly what I heard about the Enertia also.I was just concerned that with the extra RPM that I would start bumping the rev limiter which is factory set at 5150.I have been told that basically just sidestepping to the 19 would get me real close to 50 MPH.I wondered also if I stepped up to a 20 inch or even a 21 inch,that that may alleviate the RPM problem and get me a tad more speed yet.Thanks for your response.
Commander Coo1	posted 12-10-2012 02:30 PM ET (US) It looks like with the Vengeance you are slipping about 15% at WOT. A lot of reports I have read with people using the Enertia, they generally end up with slip at around 9-10% from what I have read. If that was the case, you may see 48-49mph at 4900-5000RPM would be my guess. I am by no means an expert, I just am doing a prop hunt myself and have looked a lot at the enertia. I would not expect the Enertia to turn more RPMs than the vengeance, most people that say the Enertia turns more RPMs are comparing it to the mirage, tempest, rev4, and other similar large propellers. The Enertia's diameter shrinks quite a bit when it is in 19p, so it would be interesting to see how well it can carry a the load of a 23' cuddy. I have spend a lot of time (probably too much time) reading on propgods.com http://www.google.com/search?hl=en&tbo=d&rlz=1C1GGGE_enBS413BS413& biw=1280&bih=933&q=site%3Apropgods.com+vengeance+vs+enertia+& oq=site%3Apropgods.com+vengeance+vs+enertia+&gs_l=serp.3...2577.7136.0. 7353.5.5.0.0.0.0.57.262.5.5.0.les%3B..0.0...1c.1.mTXQfrmG4kI It seems the more often than not, they recommend a large propeller like the Mirage or Thunderbolt for larger and heavier boats. I used to have a Vengeance, and it was the worst prop I have tried on my boat by far. Good luck, and keep us posted--James
Davele	posted 12-10-2012 07:10 PM ET (US) From what I've read about the Vengeance, if a person were upgrading to a stainless steel propeller from an aluminum, then the Vengeance is the right choice--an entry level SS propeller. The Mirage was recommended to me, but was told I might only see a roughly 1-MPH gain with an improvement in midrange. Is there any harm in running an engine at the low end of the RPM range as long as your not lugging the engine? It has always been said that you should be as close to the upper end of the range. My range is 4,600 to 5,000. And yes, I too have been all over PropGods. Thanks for your thoughts Jim. Keep'em coming and I'll keep playing with the prop selector.
jimh	posted 12-10-2012 10:24 PM ET (US) Read my article on the propeller power curve to understand how running a higher-pitch propeller affects engine reserve power and accelleration. http://continuouswave.com/whaler/reference/propellerPowerCurve.html
Davele	posted 12-13-2012 09:45 PM ET (US) Hello Jim and thank you for that great information.It's funny you did your test with a Revolution 4 prop.The manufacturer of my boat put a Rev 4 on when we picked it up new.I THINK it was a 19 inch.When I ran the boat the first time at WOT I got right around 42 MPH at roughly 4200 PRM.In escence I think maybe I don't have enough horsepower to turn a prop that large.Is that a correct assumption? Also according to the Speed Prediction Formula,when I factor in my boat weight and with a Hull factor of 180 it is a tad higher(47.9)compared with the performance that I'm achieving(46.76)with my current prop.Using hull factor 172 I get 45.8 MPH.So in conclusion based on what I've learned from you all I think 50 (or just shy of) is about all I'm going to be able achieve by switching to an Enertia and I'm happy with that.I hope I wasn't to much of a pain.Just trying to learn as much about props as I can.Definitely an interesting subject.Thanks also to Commander Cool and Tom for your valuable help.I really appreciate it.Lets hope for a quick return to Summer so we can all get back on our boats and I can get my new prop!Sincerely,Dave.
martyn1075	posted 12-19-2012 08:50 PM ET (US) I have no complaints with my ENERTIA props. They are fairly light as well. Good investment I think although hard at first to stomach $500-1000 depending on where you shop for a prop. I think you get what you pay for in this world it seems. However there are good buys out there at times if you are willing to wait and pounce. Martyn
Tom W Clark	posted 12-21-2012 01:01 PM ET (US) quote: ...if a person were upgrading to a stainless steel propeller from an aluminum, then the Vengeance is the right choice No, the Vengeance is not a good fit for a 23 foot cuddy with sterndrive power. You want a propeller with more blade area like the Mercury MIRAGEplus or the Revolution 4. The Enertia would be worth a try as well too; the lower pitch Enertias have rather large diameters and a lot of blade area.
Davele	posted 12-23-2012 02:25 PM ET (US) Tom,I stand corrected.According to Mercurys' website they call the Vengeance prop a general purpose prop designed to provide increased top speed,aceleration and durability over a comparable aluminum prop.The Vengeance does just OK on my Cuddy but I feel that there is more speed to be had.That's why I'm looking so strongly at the Enertia.Again,thanks all and keep the recommendations(ie pitch,etc.)coming.
martyn1075	posted 12-23-2012 07:22 PM ET (US) As far as performance I have determined a 2mph difference with the Enertia props. Personally I don't really care too much I'm not a speed demon but its fairly accurate vs the mirage plus props that were also included with the boat. I really like the hole shot with these props as well turning at high speeds the performance is just brilliant. I thinks it's a combination between boat design engine hp and engine setup that makes the correct prop work not just the prop. Martyn
Davele	posted 12-30-2012 12:35 PM ET (US) Hello Martyn and thanks for your input.A 2MPH gain is quite good and I would be very happy with that.I agree that hull design,weight and horsepower are a factor on how well a particular boat performs. Yes the deals are out there especially when the Enertia first came on the market at over $600.00.I've seen them on E-bay for $498.00.Just want to make sure I determine the correct pitch before I pull the trigger.I've learned alot from this forum and others and I thank you all for your help and input.I will post my results ASAP next Spring.I am excited about the possible results.
L H G	posted 12-30-2012 02:08 PM ET (US) Buy your new Mercury props here, like I do. (scroll down) Mirage Plus $379, Enertia $449 with hub and shipping, no sales tax. http://jacosmarine.com/ I have yet to find better pricing on the web, unless you can find a decent used one on Ebay. You may also be able to find an internet seller who has the LH prop on sale, since they are harder to get rid of.
Commander Coo1	posted 01-01-2013 09:37 PM ET (US) I just ordered one from Propgods.com, it was 499, but he offers a lot of help with prop selection whether you buy from him or not. You can also swap it for $35 if you need a different style or pitch, he also sends out test props for i think $30 plus shipping.
Davele	posted 01-07-2013 07:05 PM ET (US) L H G,those are some great prices on props.My dealer said not to buy anything just yet because he will be able to swap out my Vengeance for an Enertia that he said is what I needed all along.Unfortunately we are under the grip of Winter so I'm playing the waiting game till Spring.As long as he's willing to keep switching till I'm satisfied I'm OK with it.Problem is he's 3 hours away.James,I have been in contact with Propgods and if things don't work out with the dealer I may go that route.I just don't want to be off the water to long this Spring.Thanks.
Commander Coo1	posted 01-14-2013 11:26 PM ET (US) My Enertia came in and and compared to the Mirage plus, I picked up 4.7 mph (38mph to 42.7mph), and 325RM at WOT. in the mirage's deffence, it was slightly used in 8/10 condition.
Davele	posted 01-29-2013 06:15 AM ET (US) That is an impressive increase in speed James.You have to be very happy.What make and model boat do you have your Enertia on? What was low end manueverablity like with the Enertia? And how did your boat come on plane? Sorry for all the Questions but you've got me pumped.Dave
Commander Coo1	posted 01-29-2013 08:59 PM ET (US) Dave, I am quite happy with the Enertia 15x15, mostly because it gets my engine up to the proper RPM range finally. My boat is a 1997 Outrage 20 (post classic hull) powered by a 2012 E-TEC 175. I was very impressed at the speed increase from the Mirage plus, it was a huge jump. other props i have tried like the BRP Rebel and OMC SST got me speeds of about 41mph. Not quite as fast as the Enertia. The Enertia has very good low speed maneuverability, I may like its characteristics better than the Rebel and Mirage on my setup. Holeshot is night and day comparing other props i have tried to the Enertia. Even though the Enertia is actually heavier, it spins up quickly and gets my boat up in a hurry. The only downside to this prop is its low speed planing ability, the boat seems require a higher engine RPM and boat speed to maintain a steady plane. When I tuck the motor in, put tabs down and try to stay slow I tend to burn quite a bit more fuel than other style props. maybe .3-.4mpg lower at this speed. at 20 mph before I might get 3.3 and now i get 3.0 or so when loaded to fish. On the flip side, it achieves .3-.4mpg better at a fast cruise. at 32mph I get about 3.3 where i used to get 3.0. So it all evens out i think. On a rough day the Rebel or Mirage would be more fuel efficient than the Enertia. The Enertia has definitely made my boat feel more "alive!" If you have any more questions don't hesitate to ask. I also have another thread that compares all the props that I tested on my boat that is on this site also.
Davele	posted 02-01-2013 04:13 PM ET (US) Thanks James.Good to hear you are happy with your purchase.Could you possible direct me to your thread comparing props? Thanks again for sharing your info.
Commander Coo1	posted 02-01-2013 05:29 PM ET (US) http://continuouswave.com/ubb/Forum4/HTML/007839.html I hope that helps you out Dave! I also mentioned a Vengeance propeller that I tried, it did not work well at all for me. -James
Davele	posted 10-20-2013 09:22 PM ET (US) Hi guys. Been a while since I posted but it took this long for me to aquire an Enertia prop. Finally landed one from a marina in Wisconsin. My results: Conditions were minimal lake chop, humidity around 57%, light winds. I made three runs, one against the wind and got no increase in speed. Failed to check RPM's. Second run was with the wind and got 47.5/48 MPH. Baffled me as to why I wasn't seeing any noticeable increase in speed until I checked the RPM's on second run: 4,600 to 4,650-RPM. Third run was again with the wind and got 48.17. All speeds were GPS. Planing times were noticebly better than my Vengeance and low speed control was very good. I may have seen 50 had I been able to spin the prop to 5,000-RPM. That's what Ken said at Propgods, also. I was ready to make the purchase but unfortunately the speed just wasn't there. [I plan] to send-in my Vengeance over the Winter to have some cup put on the tips and see how that works. That may be the end of my options. I guess I'll just have to reserve myself to the fact that I won't see 50. Oh well, at least I'll be on the pond! Thanks for all the great input thus far. If my next move sees any improvement I'll post back up.--Dave.