1988 force 50 hp

[rgrano]

Motor runs excellent carb and fuel pump rebuilt, carb adjusted to 1 1/4 turn out. Compression about 100 each cylinder(a bit low). My problem is it seems to not run at an acceptable speed,15-18 mph, 10hp's seem to be faster than mine. New prop size 10 3/8 x 11 1/2. mixing reg unld. gas 2.6 oz. per gal. Plugs are slighty wet but not black. Do I need a different prop? Do you think it is the compression? Carb completely horizontal at wot. I've already decarbed. Any Ideas would be most appreciated. <br />Model 507Y8D, 16 ft aluminum

 

[steelespike]

Re: 1988 force 50 hp

Compression is ok.<br />Check to be sure it is running on both cylinders.<br /> If plugs are wet and no black it could be a spark problem or possibly a head gasket.Sometimes a weak head gasket will let in just enough water that it cleans a plug and makes it lose power.But more likely you have one cylinder that is not firing.(spark)

 

[Docdoc]

Re: 1988 force 50 hp

I agree with steelespike. I had the exact same problem with my 88 force 50. Turned out to be a broken wire at the terminal strip. When I fixed it the damn thing had so much acceleration it damn near threw me out on throttle up. I suggest checking to be sure all wires are connected and none are broken.