Is it illegal to throw a larger hp motor than the boat's specs stamped on the plate?

[JimS123]

Re: Is it illegal to throw a larger hp motor than the boat's specs stamped on the pla

The transom bracket on that motor should have about five vertical adjustment settings. Move her up 3/4" at a time and you'll notice quite a difference.

 

[12thManFalseStart]

Re: Is it illegal to throw a larger hp motor than the boat's specs stamped on the pla

The transom bracket on that motor should have about five vertical adjustment settings. Move her up 3/4" at a time and you'll notice quite a difference.

Yea, I tried the farthest one, and it goes straight ok, but when turning, it catches air, and won't stop until I almost shift back to neutral. One notch back, and I can turn again. So I'm trimmed up the best I can by manually doing it with the holes.

 

[12thManFalseStart]

Re: Is it illegal to throw a larger hp motor than the boat's specs stamped on the pla

Back from autozone. They lend you a compression checker for $40, and you get it back when you take it back. Cool. Bought a normal can of seafoam, and a spray seafoam. $23 ish for both. Not cheap. Hope it works well. I might record it, and throw her on youtube.

 

[82rude]

Re: Is it illegal to throw a larger hp motor than the boat's specs stamped on the pla

what kind of taxes you got in wash?seafoam is around 6 bucks at wallyworld.

 

[12thManFalseStart]

Re: Is it illegal to throw a larger hp motor than the boat's specs stamped on the pla

Crazy stupid taxes. Autozone, it was 14 for the regular seafoam, and 11 for the seafoam spray.

Compression test cylinders 1-3 was 121. Cylinder 4 was 112.

 

[metriccrescentwrench]

Re: Is it illegal to throw a larger hp motor than the boat's specs stamped on the pla

Compression is ok.

Also, I gotta' agree with the replies that state that you won't gain anything by upping the prop pitch. With a light to moderate load you want to be as high up in the recommended rpm range as possible. You'll get a better hole shot that way and won't lug the engine.

 

[JimS123]

Re: Is it illegal to throw a larger hp motor than the boat's specs stamped on the pla

Yea, I tried the farthest one, and it goes straight ok, but when turning, it catches air, and won't stop until I almost shift back to neutral. One notch back, and I can turn again. So I'm trimmed up the best I can by manually doing it with the holes.

I wasn't talking about the trim adjustment, I was talking about raising the motor on the transom. From your pics it looks like the hull has a shallow V, thus the motor may be too low on the transom. To adjust height like I said, you need to remove the motor from the boat.

 

[greenbush future]

Re: Is it illegal to throw a larger hp motor than the boat's specs stamped on the pla

The sea foam should give you a bit more crisp performance. Have you checked the foam under the floor? good bet a boat of that age may have a bunch of wet flotation foam that is adding weight to your boat. I would hold off on the new plugs until you have treated the motor with the sea foam, then change em out. Get ready for a great white smoke out!! My neighbors just love when I do this in the spring!!