1988 50hp force prop spin?

[rzr1963]

Greetings everyone,

I am fairly new to this whole boat world, but i am learning fast...bring $$$. Anyway have a 1988 force 50hp, did the impeller, seals, etc... runs fairly good. The issue is that for about 6-8 times out every now and then the motor felt like it had jumped, lurched, skipped like a motorcycle jumping out of gear. Very intermittent and not often. On my last time out it did it a few times, then the motor felt like it was out of gear when given any throttle, was able to move at just a little above idle. No grinding noises, but i figured lower unit or stripped spline at the motor, disassembly revealed some galling on the pinion and forward gear but not convinced that was it. Asked a few people about it. One friend of mine told me the prop had spun on a damper between the inner and outer hubs? Is this common? I am gonna mark the prop and take it out. Just curious if this was something that happens on props alot?

Thanks,

Rzr

 

[jerryjerry05]

Re: 1988 50hp force prop spin?

It could be the prop.Mark it and go for a ride.
The next thing is the clutch dog in the gear case.The mating edges can be rounded over and that will cause jumping or lurching in gear.J

 

[rzr1963]

Re: 1988 50hp force prop spin?

Thanks for the reply,
I marked the prop and took it out, no prop spin. So I tried adjusting the throttle\clutch linkage turnbuckle to see if it would change anything, no change noticed. But I do now notice that as I had throttled back before when the engine revved up to avoid any further damage, if I let it go a second longer I noticed it started picking up speed and the rev calmed like it caught whatever was slipping. There was no clunking or grinding at all. Also noticed my speed was down from an indicated 34-37mph range to a 26-29mph range. So its still not right. Whats odd to me is if it was now engaging the clutch why the mph loss? When I had the lower apart for the initial inspection to see what was wrong I did notice the wear (rounded edges) on the clutch. I just don't understand the loss of speed now. Anyway probably gonna see if I can get some machining done. Would like to wait till colder weather. Is it dangerous to operate with this condition?

Thanks,

Rzr