Force 50 rough spot

[rogerwa]

I have a rough spot in my OB acceleration. There is a definite range on RPM's where it jerks pretty bad and then it will pop into higher revs with just a little throttle. It's not bogging.<br /><br />I recently tore down the carb and pulled the main jet out and it wasn't exactly clear how it went back in. I do not remember this problem before I tore it down.<br /><br />Also, low end runs fine and 3/4 to full WOT is just fine. If I slam the throttle home, which I don't like to do, it doesn't take long for the RPMs to come up.<br /><br />It just seems like a rough spot. Any ideas on what it might be?

 

[12Footer]

Re: Force 50 rough spot

Does it act like it's popping- out of gear? Or act like a slipping clutch?

 

[12Footer]

Re: Force 50 rough spot

Just re-read your post... It could be timing or a loose advance rod ( too much play).

 

[norman158]

Re: Force 50 rough spot

if this is a old force i had the same thing with mine one of the wires on the points is broken and not making contact all the time replace both wires

 

[rogerwa]

Re: Force 50 rough spot

This is a 1992 motor so it has no points.<br /><br />The problem is that there is just a range of RPM that it shudders and does not increase RPM smoothly (it shudders) until I move the throttle forward enough and it kind of "pops" up to a higher RPM where it is smooth.<br /><br />I inspected the linkage and it appears to be tight. As far as timing is concerned, wouldn't I have problems at other ranges? This is the only problem this motor has. It starts cold or hot immediately.

 

[12Footer]

Re: Force 50 rough spot

crack open the mixture adjustment a qaurter turn, Roger. It might solve that. If not,you can allways turn it back. And it's better to burn too rich than too lean.