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Author Topic:   250 hp on 25 outrage

outrage posted 01-13-2006 01:31 PM ET (US)
I am thinking of putting a 1990 250 hp Yamaha on the back of my 1984 25' outrage and was wondering if anyone had any performance information for this engine on this hull. I am not very familiar with this motor and haven't seen one on the back of a 25' outrage before. Most the of 25' whalers around here have either twins or a 225 hp of some variety. Any information about this model engine would be appreciated.
Tom W Clark posted 01-13-2006 01:40 PM ET (US)
I have a little experience running Larry Eaton's Outrage 25 with a Yamaha 250 HPDI. It's a wonderful power package. The boat will do 45 MPH.
I would not hesitate to put a single 250 on an Outrage 25. To those who will tell you the boat would be underpowered, I say: HOGWASH.
Peter posted 01-13-2006 01:58 PM ET (US)
It's a very thirsty carbureted V6 2-stroke. I think that was the first year for the 3.1L 76 degree block.
DeeVee posted 01-15-2006 11:04 AM ET (US)
My brother in law's Outrage 25 is powered with a single 275 Mercury. He is getting close to having her seaworthy for some winter blackmouth fishing next month. I will able to comment more about after a few times out. He has had the boat over 45 mph easily.
For the little bit he has had the boat out, he is very happy with the power. He does not like the slight list while on plane, though. He may investigate trim tabs sometime in the future.
I agree with Tom, 250 HP would be plenty of power.
Doug Vazquez
1989 22' Outrage
John from Madison CT posted 01-15-2006 05:46 PM ET (US)
IMHO, a 250HP OB on a non-W/D 25' Outrage is plenty of power.
On a Whaler Drive model, it would be less speedy, but still adequate power for sure.
lae posted 01-15-2006 10:08 PM ET (US)
C'mon Tom, You know that a lot are never going to agree with singles. Just different applications. All I know is that my 25 suits me wonderfully at this point in my life. Get me to salt more often and I may reconsider.
Buckda posted 01-15-2006 10:13 PM ET (US)
My dad has the 1994 version of that engine on his 22' Guardian. Pushes the boat plenty fast - should be enough for a 25; but you can practically hear the aluminum tank flexing from the suction. That puppy drinks Texaco through a very fat pipe.
You may wish to talk to Kingfish - I think he has this motor on a similar sized (26 ft?) Parker.
aquaman posted 01-15-2006 11:14 PM ET (US)
Outrage,
I run a Yamaha 250EFI on my 24 Outrage, it is more then enough power. Mine runs out at about 46MPH and gets pretty decent fuel mileage at cruise.
DeeVee,
Your brother-in-laws 275 Merc, is that one one the 90's era Cosworths?
John
kingfish posted 01-15-2006 11:26 PM ET (US)
Dave (et al)-
I've got a Yamaha 225 OX66 (EFI) on our Parker - great motor with huge low and midrange torque on the 5000# modified V cabin boat, but it sounds like we're talking about way different motors...
John
xfbi posted 01-15-2006 11:45 PM ET (US)
i have a 74 22 outrAge with a 93 250 yamaha will informatin about this set up be of value to you?
outrage posted 01-16-2006 08:19 AM ET (US)
This is all good information. Can anyone give me an idea on what to expect on fuel economy? Do you think it would be possible to get 2 miles/gallon at cruising speed?
Are there any know quirks or problems associated with this motor that I should be aware about?
Thanks again for the information.
Peter posted 01-16-2006 08:47 AM ET (US)
you should be able to get at least 2 MPG at cruise (about 4000 RPM). For an idea of the performance you might expect, see the performance report for the 250 EFI at www.yamaha-motor.com/assets/products/otb/bulletins/ bulletin_otb_2StrokePerf_OX666_250hp_017-COB-Z.pdf . The carbureted 250's fuel consumption is not much different than the EFI version of that motor at the same engine speeds. The 250 should be able to turn a 17 inch pitch propeller on the 25 Outrage.
If the engine is mounted at the typical conservative mounting heights (one hole up), top speed will probably be in the low 40s, maybe 45 MPH lightly loaded with 1 person and a couple of gallons of fuel in the tank with the wind at your back and no bottom paint.
macfam posted 01-16-2006 02:13 PM ET (US)
On my 25' Revenge WT w/Yamaha 250 EFI OX66, I'm running a 19" pitch SS. Top rpm is about 5400. Top speed 42-43mph.
Evens runs great with a heavy load of 6-8 people and gear.
Boat is bottom painted, but very smooth.
I don't need more power.
Estimated fuel at cruising (3750-4000) rpm: 2.5 mpg
Peter posted the link to Yamaha's performance bulletin on the 25' Cobia w/250hp OX66.
That's pretty close to what I see for numbers too.
Peter posted 01-16-2006 03:38 PM ET (US)
Macfam -- Wow, I'm surprised the 250 is turning a 19P on your Revenge to 5400 RPM and only getting 42 to 43. That works out to nearly 20 percent slip. Are you sure its not a 17P which is about the most pitch I would consider for the 25 Revenge and Yamaha 250.
macfam posted 01-16-2006 04:28 PM ET (US)
Peter,
It's a 19" for sure.
But that doesn't mean I've got the right prop!
So with rpm's in range(5400)I'm assuming that my digital Yamaha tach is pretty darn close to accurate, and GPS's (two, Raymarine & Garmin handheld)what would you suggest?
17" Mirage plus?
17" Mirage?
Something else?
Bob(macfam)
Peter posted 01-16-2006 04:47 PM ET (US)
If you are turning 5400 RPM (max is 5500) and getting 42-43 MPH, I guess I wouldn't change a thing. Is that a Yamaha Saltwater Series propeller?
macfam posted 01-16-2006 07:58 PM ET (US)
Peter,
I think it's a stock Yamaha Series prop, but I couln't swear to it.
Still want to try some others to see a comparison.
DeeVee posted 01-16-2006 09:01 PM ET (US)
aquaman
Yes, you are correct, my brother in law's 25 OR has the early 90's 275 HP Cosworth block Mercury.
Doug Vazquez
1989 22'Outrage
aquaman posted 01-16-2006 11:34 PM ET (US)
Outrage and Peter,
My findings are about the same as Macfam, however my boat might be a little lighter. I run a 19P SWS Yamaha on my 250EFI Yamaha. The boat is 24 Outrage WOT @ 5,400RPM and 46MPH with bottom paint... I also have a 17P SWS and get about 43mph at 5,600 rpm. You should get close to 2.5mpg if you cruise it at 4,000rpm.
DeeVee,
I'll bet the 25 flies with that Merc 275.
John
DeeVee posted 01-17-2006 11:56 PM ET (US)
John,
I have only been on the boat once and my brother in law has only had it out twice since he bought it in September (he has been really busy at work and also trying to get the boat into useable shape).
If I remember correctly, we were able to get it close to 50. Idling on the hose, it sounds like a top fuel dragster!
Doug
outrage posted 01-26-2006 06:57 PM ET (US)
Thanks for all the information. I am currently having the motor put on the boat and would like to get some more ideas on what prop to run on this rig. A couple of you have mentioned the type and size prop that you are using...anyone else like to provide some performance data. Thanks again for the information.

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Author	Topic: 250 hp on 25 outrage
outrage	posted 01-13-2006 01:31 PM ET (US) I am thinking of putting a 1990 250 hp Yamaha on the back of my 1984 25' outrage and was wondering if anyone had any performance information for this engine on this hull. I am not very familiar with this motor and haven't seen one on the back of a 25' outrage before. Most the of 25' whalers around here have either twins or a 225 hp of some variety. Any information about this model engine would be appreciated.
Tom W Clark	posted 01-13-2006 01:40 PM ET (US) I have a little experience running Larry Eaton's Outrage 25 with a Yamaha 250 HPDI. It's a wonderful power package. The boat will do 45 MPH. I would not hesitate to put a single 250 on an Outrage 25. To those who will tell you the boat would be underpowered, I say: HOGWASH.
Peter	posted 01-13-2006 01:58 PM ET (US) It's a very thirsty carbureted V6 2-stroke. I think that was the first year for the 3.1L 76 degree block.
DeeVee	posted 01-15-2006 11:04 AM ET (US) My brother in law's Outrage 25 is powered with a single 275 Mercury. He is getting close to having her seaworthy for some winter blackmouth fishing next month. I will able to comment more about after a few times out. He has had the boat over 45 mph easily. For the little bit he has had the boat out, he is very happy with the power. He does not like the slight list while on plane, though. He may investigate trim tabs sometime in the future. I agree with Tom, 250 HP would be plenty of power. Doug Vazquez 1989 22' Outrage
John from Madison CT	posted 01-15-2006 05:46 PM ET (US) IMHO, a 250HP OB on a non-W/D 25' Outrage is plenty of power. On a Whaler Drive model, it would be less speedy, but still adequate power for sure.
lae	posted 01-15-2006 10:08 PM ET (US) C'mon Tom, You know that a lot are never going to agree with singles. Just different applications. All I know is that my 25 suits me wonderfully at this point in my life. Get me to salt more often and I may reconsider.
Buckda	posted 01-15-2006 10:13 PM ET (US) My dad has the 1994 version of that engine on his 22' Guardian. Pushes the boat plenty fast - should be enough for a 25; but you can practically hear the aluminum tank flexing from the suction. That puppy drinks Texaco through a very fat pipe. You may wish to talk to Kingfish - I think he has this motor on a similar sized (26 ft?) Parker.
aquaman	posted 01-15-2006 11:14 PM ET (US) Outrage, I run a Yamaha 250EFI on my 24 Outrage, it is more then enough power. Mine runs out at about 46MPH and gets pretty decent fuel mileage at cruise. DeeVee, Your brother-in-laws 275 Merc, is that one one the 90's era Cosworths? John
kingfish	posted 01-15-2006 11:26 PM ET (US) Dave (et al)- I've got a Yamaha 225 OX66 (EFI) on our Parker - great motor with huge low and midrange torque on the 5000# modified V cabin boat, but it sounds like we're talking about way different motors... John
xfbi	posted 01-15-2006 11:45 PM ET (US) i have a 74 22 outrAge with a 93 250 yamaha will informatin about this set up be of value to you?
outrage	posted 01-16-2006 08:19 AM ET (US) This is all good information. Can anyone give me an idea on what to expect on fuel economy? Do you think it would be possible to get 2 miles/gallon at cruising speed? Are there any know quirks or problems associated with this motor that I should be aware about? Thanks again for the information.
Peter	posted 01-16-2006 08:47 AM ET (US) you should be able to get at least 2 MPG at cruise (about 4000 RPM). For an idea of the performance you might expect, see the performance report for the 250 EFI at www.yamaha-motor.com/assets/products/otb/bulletins/ bulletin_otb_2StrokePerf_OX666_250hp_017-COB-Z.pdf . The carbureted 250's fuel consumption is not much different than the EFI version of that motor at the same engine speeds. The 250 should be able to turn a 17 inch pitch propeller on the 25 Outrage. If the engine is mounted at the typical conservative mounting heights (one hole up), top speed will probably be in the low 40s, maybe 45 MPH lightly loaded with 1 person and a couple of gallons of fuel in the tank with the wind at your back and no bottom paint.
macfam	posted 01-16-2006 02:13 PM ET (US) On my 25' Revenge WT w/Yamaha 250 EFI OX66, I'm running a 19" pitch SS. Top rpm is about 5400. Top speed 42-43mph. Evens runs great with a heavy load of 6-8 people and gear. Boat is bottom painted, but very smooth. I don't need more power. Estimated fuel at cruising (3750-4000) rpm: 2.5 mpg Peter posted the link to Yamaha's performance bulletin on the 25' Cobia w/250hp OX66. That's pretty close to what I see for numbers too.
Peter	posted 01-16-2006 03:38 PM ET (US) Macfam -- Wow, I'm surprised the 250 is turning a 19P on your Revenge to 5400 RPM and only getting 42 to 43. That works out to nearly 20 percent slip. Are you sure its not a 17P which is about the most pitch I would consider for the 25 Revenge and Yamaha 250.
macfam	posted 01-16-2006 04:28 PM ET (US) Peter, It's a 19" for sure. But that doesn't mean I've got the right prop! So with rpm's in range(5400)I'm assuming that my digital Yamaha tach is pretty darn close to accurate, and GPS's (two, Raymarine & Garmin handheld)what would you suggest? 17" Mirage plus? 17" Mirage? Something else? Bob(macfam)
Peter	posted 01-16-2006 04:47 PM ET (US) If you are turning 5400 RPM (max is 5500) and getting 42-43 MPH, I guess I wouldn't change a thing. Is that a Yamaha Saltwater Series propeller?
macfam	posted 01-16-2006 07:58 PM ET (US) Peter, I think it's a stock Yamaha Series prop, but I couln't swear to it. Still want to try some others to see a comparison.
DeeVee	posted 01-16-2006 09:01 PM ET (US) aquaman Yes, you are correct, my brother in law's 25 OR has the early 90's 275 HP Cosworth block Mercury. Doug Vazquez 1989 22'Outrage
aquaman	posted 01-16-2006 11:34 PM ET (US) Outrage and Peter, My findings are about the same as Macfam, however my boat might be a little lighter. I run a 19P SWS Yamaha on my 250EFI Yamaha. The boat is 24 Outrage WOT @ 5,400RPM and 46MPH with bottom paint... I also have a 17P SWS and get about 43mph at 5,600 rpm. You should get close to 2.5mpg if you cruise it at 4,000rpm. DeeVee, I'll bet the 25 flies with that Merc 275. John
DeeVee	posted 01-17-2006 11:56 PM ET (US) John, I have only been on the boat once and my brother in law has only had it out twice since he bought it in September (he has been really busy at work and also trying to get the boat into useable shape). If I remember correctly, we were able to get it close to 50. Idling on the hose, it sounds like a top fuel dragster! Doug
outrage	posted 01-26-2006 06:57 PM ET (US) Thanks for all the information. I am currently having the motor put on the boat and would like to get some more ideas on what prop to run on this rig. A couple of you have mentioned the type and size prop that you are using...anyone else like to provide some performance data. Thanks again for the information.