Force 50 NO Acceleration Under Load

[onlygm]

I have a 1989 Force 50 HP 2 Stroke on a 17' spectrum. We got the boat 2 months ago and the first weekend we took it out it was running like a champ. The week after, we took it out and it wouldn't go faster than 5 mph. Took it to the local boatyard and they ran a few tests. Compression, Timing, Plugs, Coils and Fuel delivery are all FINE. They did say that when they pulled the plugs they were drenched in fuel. It is definietely running too RICH. But my question was if it was running too rich why didn't it stall or just cut off . Engine revs up in the driveway to about 2000 RPM. About the same when under load. No choking, No spitting, No stalling...just no power. Idle is kind of rough until it heats up but after that, it idles great. <br />Have 2 boatyards stumpped on this..any help will be greatly appreciated.

 

[JB]

Re: Force 50 NO Acceleration Under Load

Howdy.<br /><br />If the spark and fuel delivery are TRULY okay, I would then look into timing.<br /><br />Your flywheel may have sheared the key, or the linkage from throttle to timer base may be screwed up or disconnected.<br /><br />Good luck.

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

They said that the timing was all in sync and that everything as far as mechanical linkages are in working order. They think the main problem is that too much fuel is being delivered into the engine. There is no way to control the amount of fuel to be delivered into it. Any ideas on how to control the amount or if the carb would be at fault. It was rebuilt a few weeks ago but that didn't sovle the problem. They put in a new float, and they said the float needle was a little worn but should still function.

 

[S.T. Marine]

Re: Force 50 NO Acceleration Under Load

Are the reeds damaged?

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

they could be, i dont know much about that. Do you think it might be an air delivery issue?

 

[S.T. Marine]

Re: Force 50 NO Acceleration Under Load

It doesnt hurt to check them. They should be closed all the way when the motor is not running. One could be damaged or open all the time. It is easy to check to see if it is damaged. good luck

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

Could that be a reason why there is too much fuel in the engine. The plugs were said to be pretty much soaked.

 

[S.T. Marine]

Re: Force 50 NO Acceleration Under Load

Could very well be.... Are you sure all of the cylinders are firing? How many plugs are wet??? The only reason that the plugs should be wet with fuel would be that the cylinder is not firing or the cylinder is getting to much gas to it. Let me know

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

Both Cylinders are firing and compression is normal. Both plugs get wet and we cant seem to control the amount of fuel that gets into it. Isn't it supposed to stall or cut off if too much gas is being thrown into the engine? Its not doing that. Its idling perfect and running like it would if the the throttle was set at the mark for 2000 RPMs. It just is not getting any power to it. Any ideas on how to control the fuel delivery?

 

[S.T. Marine]

Re: Force 50 NO Acceleration Under Load

There really is no way to control the fuel to it. The only think you could try is a smaller diameter fuel hose going to the motor. It might cut down the on the fuel problem a little. You probably have 3/8" fuel line is usually standard. You can try 5/16" but I would try to figue out the problem the right way first. Did you take it to a mechanic? If so they should have been able to fix it if not they should be out of business. Good luck let me know!!

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

We took it to 2 mechanics and both of them were scratching their heads. No luck what soever. Both said it was fuel related but couldn't fix it. Isn't the carb supposed to control fuel flow? From what i can gather, the float is supposed to cut off fuel flow whenever the bowl is full which prevent over filling of fuel. Maybe the carb should be looked at? This is just really frustrating...it work for a day and the next week without touching it whatsoever, we have this...

 

[S.T. Marine]

Re: Force 50 NO Acceleration Under Load

It might be the carbs. I dont know personally i would have to look at it and I am all the way in RI so that wont happen. The mechanic should be able to find out the problem and fix it. If he can't he should not call himself a mechanic. I am a mechanic and I would never tell a customer I dont know what the problem is but i cant fix it!! How would I look?? Pretty bad. If you need some used carbs I Might be able to get you a used set. Keep me posted

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

I will find the model of the carb incase we need one. Its hard to fine parts for the force motors. Can you send me an email address?

 

[S.T. Marine]

Re: Force 50 NO Acceleration Under Load

StMarine@hotmail.com I have a supplier in colorado and arizona for used parts. Might get lucky!

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

Thanks alot. i really appreciate. Will stay in touch.

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

Anybody else have any IDEAS?<br /><br />Please Help....

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

Anyone, Anyone, Bueler, Bueler....

 

[JB]

Re: Force 50 NO Acceleration Under Load

Hmm. When you said fuel delivery was okay, I assumed that you included the carb(s).<br /><br />It would not be the first time a newly rebuilt carb cause a problem because of float setting or improper installation of a part.<br /><br />I'd go there next.<br /><br />Good luck.

 

[S.T. Marine]

Re: Force 50 NO Acceleration Under Load

One more idea.. SEll the hyundai (FORCE) and get a mercury or mariner jk good luck

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

S.T. Marine - Your right ... <br /><br />JB, Thanks for the info. I will try putting on a new carb and see if that fixes the prob. Lets say that it doesnt have any change, would you have any other ideas as to what could be wrong? I dont have that much time to mess with it and want to try a couple things this weekend. Thanks Again.