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K301 1200 Cub


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#1 WoodyChuck OFFLINE  

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Posted December 14, 2016 - 08:34 PM

So I got the engine back together after replacing the piston and rings and it doesn't want to crank. I made sure it was all to specs and I have to force it to turn. I oiled it up and everything but its still a pain is this normal? This is my first rebuild so any advice is good thanks!

#2 boyscout862 ONLINE  

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Posted December 15, 2016 - 12:22 AM

It should turn fairly easily. Did you lubricate all parts before assembly? Did you put the correct number of shims under the bearing plate? Is this with the head still off? I check fit and movement as I assemble. DO NOT force anything. Post some pics and we will figure it out. Good Luck, Rick


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#3 MH81 OFFLINE  

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Posted December 15, 2016 - 08:04 AM

Assuming it's all assembled correctly, It sounds like the rings are too tight or one has broken and is ruining your bore.
If you think something isn't right, it probably isn't. Check for anything external. Something binding the flywheel, etc.
If nothing external, Probably Time to open her back up before serious damage happens.
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#4 secondtry OFFLINE  

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Posted December 15, 2016 - 12:12 PM

I'm with MH81. If you cant turn it by hand start taking things off until you can. Spark plug first. My guess would be rod cap 180 out. When I assemble an engine I check movement after installing each and any moving part. Don


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#5 WoodyChuck OFFLINE  

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Posted December 15, 2016 - 09:32 PM

I figured it out! I put the rod in backwards so I took it out turned it 180 and its good now.




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