OS 18 roto start problem

[Corpse0]

I'm haveing problems with my OS 18 CV_Rs. I have a roto start back plate on it. The engine when I try to start it, it makes 1 pop sound then it just spin's like the piston isnt going up and down untill I stop the roto start and try agian it will make 1 pop sound then it just spin's. I have looked at the roto start back plate and the gears are in perfect working order. I think that the notch in the plate "with the shaft that has the one way bareing" isnt in good contact with the piston rod pin at the bottom causeing it to not move the piston. Haa any one had this problem? and how and what do I need to fix it. I hope this is easy to understand.

Thanks for your time guys

 

[phx123]

It sounds to me like your one way bearing is slipping . I had the same problem on my 2.5r mill .

 

[Candyman]

+1 on the one-way slipping. To clean it, remove the one-way from the roto-start backplate assembly. Hose it down with some nitro wash or denatured alcohol. Do it a couple times. Then shake out or blow out all the alcohol and let it dry. Once it's dried, give it a good dose of light oil, like 3-in-1. Slip it back on the shaft and roll it a few times to get the oil to work into the bearing. Heck, why not give it a few more drops. Then it should be ok. As a safeguard, you might want to buy a new one-way anyway because once these things start to slip, they'll keep doing it as time goes on.

 

[Corpse0]

cool thanks I will try and see what happens

THis is what OS support had to say:
This is not a common issue,but not unheard of.This is something that
can occur with any engine that uses an electric shaft starting system.

If an individual is constantly over priming the engine,or flooding it
when attempting to start the engine,these cause the engine to want to
sort of kick back(starter won't turn over).
This in turn causes the pin on the crankshaft to wear down the grove
that it fits into on the starter shaft.