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jimh posted 02-23-2008 05:17 PM ET (US)
I am just back from a visit to the Detroit Boat Show--like Boston Whaler also celebrating its 50th anniversary--and I made a quick inspection of the propellers being used on the new Boston Whaler boats on display there. A very surprising number of them were set up with the Mercury ENERTIA propeller. I didn't take good notes, but just going around looking at the Boston Whaler boats with Verado motors, most of them seemed to be set up with an ENERTIA propeller. This was particularly true on the boats which were likely to be over-40-MPH boats. For example, a big 320 OUTRAGE with twin Verado 300's had ENERTIA propellers. So did the 230 DAUNTLESS, I believe, as well a quite a few others.
This was my first chance to see an ENERTIA propeller. I was quite surprised. The three-bladed propeller's shape reminded me of an OMC RAKER. The tips of the blades are rather pointy. I did not notice an extreme thinning of the blades, although I do believe the ENERTIA blades are generally thinner.
It looks like the ENERTIA is the propeller of choice on quite a few of these 2008 Boston Whaler boats.
Kevchap posted 02-25-2008 09:00 AM ET (US)
I'm running a 19-inch pitch Enertia on my Outrage 18 with a 150-HP Johnson. It outpreformed all others including my 19-pitch Stilleto by at least 2-MPH at wide open throttle. [The boat reaches] 49-MPH at 5,500-RPM. I've never driven a propeller that held the water so well, both in turns and trimming. [The Mercury ENERTIA propeller is] expensive; a used [Mercury ENERTIA propeller sold] on eBay for $350.
handn posted 02-27-2008 07:46 AM ET (US)
Although one can criticize Mercury for less than first rate outboards made in prior years, they have always been at the top of the heap in prop design.
I wish the factory would put out more information on on comparative performance of their various propellers with various boat weights and uses. Often the consumer is on his own as far as ascertaining what prop is best for his or her application
I am interested to know if the Enertia props have as much "bite" as the Rev 4's in big boat slow speed applications. Rev 4's perform excellently on my boat but I am always looking to improve performance and fuel economy if I don't have to give up that slow speed bite that the Rev 4's provide.
Even an efficiently running big boat uses lots of fuel. Fuel savings can amortize the considerable expense of a prop change over a surprisingly short time.
glen e posted 02-27-2008 08:46 AM ET (US)
handn writes:
am interested to know if the Enertia props have as much "bite" as the Rev 4's in big boat slow speed applications. Rev 4's perform excellently on my boat but I am always looking to improve performance and fuel economy if I don't have to give up that slow speed bite that the Rev 4's provide.
I have run two sets of rev 4's and two sets of enertias on my boat (11K lbs loaded) and the enertias are the prop of choice right now for me. Hoever, they have no where near the slow speed or docking bite of a rev 4. The lower gear ratio of the V300 vs 250 also made the enertia work better on the same boat...
I don't think you can armchair props..I have seen props that were exactly what a professional like Ken or Tom would recoomend completely fail when bolted up. There is no substitute for a service like his...where he brings a load of props to your boat and you just start trying them out. It still mystical to me which ones work...
L H G posted 02-27-2008 06:38 PM ET (US)
Glen, I would be interested in hearing your comments on your twin V-300 installation using Rev-4's vs Enertias, re:
Fuel economy at cruise, 30-40 MPH - which are best?
Top end speed - which are faster?
Differences in boat ride, due to lift differences?
RPM differences within the same pitch (I assume the Enertia's will turn higher RPM?)

glen e posted 02-27-2008 07:06 PM ET (US)
Larry -
I don't choose a prop from the absolute best data..The data is only one factor for me, there is also smoothness, docking ability and overall feel - the rev 4 17 and the 19 enertia fit the bill and feel very good. I could care less if one prop is a one gph worse than the other...it's a total mix of many factors. Currently I run the enertia 19...
Jim please convert to a pic:
http://i67.photobucket.com/albums/h307/gersly123/finalgrid.jpg
davej14 posted 02-27-2008 07:40 PM ET (US)
http://i67.photobucket.com/albums/h307/gersly123/finalgrid.jpg

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Author	Topic: Whaler Chooses ENERTIA
jimh	posted 02-23-2008 05:17 PM ET (US) I am just back from a visit to the Detroit Boat Show--like Boston Whaler also celebrating its 50th anniversary--and I made a quick inspection of the propellers being used on the new Boston Whaler boats on display there. A very surprising number of them were set up with the Mercury ENERTIA propeller. I didn't take good notes, but just going around looking at the Boston Whaler boats with Verado motors, most of them seemed to be set up with an ENERTIA propeller. This was particularly true on the boats which were likely to be over-40-MPH boats. For example, a big 320 OUTRAGE with twin Verado 300's had ENERTIA propellers. So did the 230 DAUNTLESS, I believe, as well a quite a few others. This was my first chance to see an ENERTIA propeller. I was quite surprised. The three-bladed propeller's shape reminded me of an OMC RAKER. The tips of the blades are rather pointy. I did not notice an extreme thinning of the blades, although I do believe the ENERTIA blades are generally thinner. It looks like the ENERTIA is the propeller of choice on quite a few of these 2008 Boston Whaler boats.
Kevchap	posted 02-25-2008 09:00 AM ET (US) I'm running a 19-inch pitch Enertia on my Outrage 18 with a 150-HP Johnson. It outpreformed all others including my 19-pitch Stilleto by at least 2-MPH at wide open throttle. [The boat reaches] 49-MPH at 5,500-RPM. I've never driven a propeller that held the water so well, both in turns and trimming. [The Mercury ENERTIA propeller is] expensive; a used [Mercury ENERTIA propeller sold] on eBay for $350.
handn	posted 02-27-2008 07:46 AM ET (US) Although one can criticize Mercury for less than first rate outboards made in prior years, they have always been at the top of the heap in prop design. I wish the factory would put out more information on on comparative performance of their various propellers with various boat weights and uses. Often the consumer is on his own as far as ascertaining what prop is best for his or her application I am interested to know if the Enertia props have as much "bite" as the Rev 4's in big boat slow speed applications. Rev 4's perform excellently on my boat but I am always looking to improve performance and fuel economy if I don't have to give up that slow speed bite that the Rev 4's provide. Even an efficiently running big boat uses lots of fuel. Fuel savings can amortize the considerable expense of a prop change over a surprisingly short time.
glen e	posted 02-27-2008 08:46 AM ET (US) handn writes: am interested to know if the Enertia props have as much "bite" as the Rev 4's in big boat slow speed applications. Rev 4's perform excellently on my boat but I am always looking to improve performance and fuel economy if I don't have to give up that slow speed bite that the Rev 4's provide. I have run two sets of rev 4's and two sets of enertias on my boat (11K lbs loaded) and the enertias are the prop of choice right now for me. Hoever, they have no where near the slow speed or docking bite of a rev 4. The lower gear ratio of the V300 vs 250 also made the enertia work better on the same boat... I don't think you can armchair props..I have seen props that were exactly what a professional like Ken or Tom would recoomend completely fail when bolted up. There is no substitute for a service like his...where he brings a load of props to your boat and you just start trying them out. It still mystical to me which ones work...
L H G	posted 02-27-2008 06:38 PM ET (US) Glen, I would be interested in hearing your comments on your twin V-300 installation using Rev-4's vs Enertias, re: Fuel economy at cruise, 30-40 MPH - which are best? Top end speed - which are faster? Differences in boat ride, due to lift differences? RPM differences within the same pitch (I assume the Enertia's will turn higher RPM?)
glen e	posted 02-27-2008 07:06 PM ET (US) Larry - I don't choose a prop from the absolute best data..The data is only one factor for me, there is also smoothness, docking ability and overall feel - the rev 4 17 and the 19 enertia fit the bill and feel very good. I could care less if one prop is a one gph worse than the other...it's a total mix of many factors. Currently I run the enertia 19... Jim please convert to a pic: http://i67.photobucket.com/albums/h307/gersly123/finalgrid.jpg
davej14	posted 02-27-2008 07:40 PM ET (US) http://i67.photobucket.com/albums/h307/gersly123/finalgrid.jpg