ajv00303

I have a '95 268 Islander w/ twin '95 Johnson 175's. They weigh ~375# ea, boat is rated for 400HP Max.
Considering a pair us '99 Yamaha ox66 225's. They weigh ~500# ea.......that's an additional 250lbs hanging off the back, no too worried about the additional 50HP.....never ride WOT.
The '95 200 Johnsons were ~450# ea.........only 50# lighter than the Yamahas ea.

Any thought/opinions?

captbone

I would not be concerned with the extra weight on that particular hull.

Toothpick 10

Why not go with a pair of slightly newer 4-strokes. There's been a few guys on here that have put 150 hp, 4-strokes on their Islanders and were very happy. They felt that they had enough speed and excellent fuel economy.

ajv00303

Looking to keep cost to a Minimum.

1stGrady

I had a 95 with twin 150 HPDI’s. Very efficient, good motors that like clean fuel though. I felt the performance was excellent. 10 years one problem, stuck injector. 200’s were also a good motor. Likely really cheap right now. They are more efficient than the OX series.
My concern was the scuppers did ride a little low so I replaced all the deck drain hoses.

1stGrady

perfect setup.

2007 Yamaha hpdi for sale

ocnslr

Have a 250# friend stand on the transom, directly between the engines. Even that is further forward than where that extra weight will act on the boat, but it will give you an idea.

While he (or she) is standing there, go look at your scuppers aft. And don’t do it with an empty fuel tank.

IMHO, get a pair of 200hpdi engines and be happy with that.

SouthFork

I had the same boat with 200HPDIs on it. It was very fast and would plane with a full tank, coolers and ice, fishing gear and 4 adults very quickly. I got 30knots at 14.7 with a moderate load and 15 with a full load. Top speed was 53.

JONOV

Aside from redundancy, is there a reason that one wouldn't look for a 350/400 single outboard? I'd think that the costs associated with having a pair of them, and the reduction in weight, would allow one to look at a single higher HP outboard.

My Turn

I had a 97 with twin Salt Water Series II 200's. Scuppers were under water with those motors. If I was in your shoes I would put a single 300 or 350 on it.

Regarding the 225's, there might be insurance implications with powering in excess of CG rating.

JONOV

Everyone always says that but I've never heard of it actually causing problems. The HP is a by-word for weight as much as it is power. Theoretically I believe that a Boston Whaler dauntless 220 could have 400HP using the USCG's calculations.

My Turn

you will never know until s*** hits the fan. If you were to get in some kind of accident that the Coast Guard investigated I can't imagine it going well once they discover your power exceeds the Coast Guard plate on the boat. Same with insurance. Insurance companies are in the business of not paying claims they will deny at any opportunity. Check the very fine print of your policy and you may find that you need to adhere to all laws and regulations. But hey knock yourself out if you want to overpower

Onewolf

I'm guessing that since the OP is looking at 20+ year old gas swilling 2 strokes and said that cost is a major factor he's not interested in a new/newish 4 stroke?

I would try to find a pair of 6-10 year old 150-175 4 strokes but then I hate old gas swilling smoking 2 strokes.

WPBTH

I would ask myself how is that transom.