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Old 08-31-2009, 01:45 PM   #1
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Default Flywheel Nut

Whats the best way to tighten it onto the crankshaft without damaging the piston or rod?
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Old 08-31-2009, 01:49 PM   #2
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screw the nut on finger tight. use a pair of channel lock pliers to hold the flywheel, and tighten the crap out of the nut. put a very, very small dab of blue loctite on the threads before hand and it will hold till you want it off
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Old 08-31-2009, 01:50 PM   #3
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OK thanks but on my last engine the piston would also move up and down. But maybe it wont this time. What do i do if it does?
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Old 08-31-2009, 01:52 PM   #4
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I mark the back of the flywheel with a black marker - then turn the crank shaft so the piston is at bottom dead center (BDC) then slide the flywheel on the the collet and give it a squeeze with my thumbs on the back plate. Screw the clutch nut on and tighten hand tight. Then using a pair of channel locks and a folded shop rag. I hold the flywheel and tighten to 25 to 30 inch lbs. About a 1/4 turn after it bottoms out.

Install clutch shoes / bell and have fun!!!
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Old 08-31-2009, 01:56 PM   #5
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OK thanks but on my last engine the piston would also move up and down. But maybe it wont this time. What do i do if it does?
just stick the end of a fat zip tie up the exhaust port so the piston stops on it. tighten the flywheel nut a little bit till the flywheel collet holds enough on the crank on its own, then use the channel locks on the flywheel
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Old 08-31-2009, 01:57 PM   #6
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Quote:
Originally Posted by offr0aden View Post
I mark the back of the flywheel with a black marker - then turn the crank shaft so the piston is at bottom dead center (BDC) then slide the flywheel on the the collet and give it a squeeze with my thumbs on the back plate. Screw the clutch nut on and tighten hand tight. Then using a pair of channel locks and a folded shop rag. I hold the flywheel and tighten to 25 to 30 inch lbs. About a 1/4 turn after it bottoms out.

Install clutch shoes / bell and have fun!!!
good idea on marking BDC. probably comes in handy after shutting down the motor
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Old 08-31-2009, 02:00 PM   #7
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By fat end of the zip tie do you mean the side with the block looking thing where the flat side connects to it? And should i stick it all way in or put the fat end near the edge of the sleeve?
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Old 08-31-2009, 02:01 PM   #8
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fold it in half and stick the doubled part in...
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Old 08-31-2009, 02:12 PM   #9
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Just use channel locks. This is really not that complicated. Zip tie does work but why add stress on the piston and rod. Not to mention you could cut the zip tie. If you really want something other than channel locks, then get one of these tools.

http://www.amainhobbies.com/product_...tch-Multi-Tool
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Old 08-31-2009, 02:13 PM   #10
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And the zip tie wont scracth the piston right?
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Old 08-31-2009, 02:14 PM   #11
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Just use channel locks. This is really not that complicated. Zip tie does work but why add stress on the piston and rod. Not to mention you could cut the zip tie. If you really want something other than channel locks, then get one of these tools.

http://www.amainhobbies.com/product_...tch-Multi-Tool
just in the interest of saving money http://www.amainhobbies.com/product_...eel-Nut-Wrench
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Old 08-31-2009, 02:19 PM   #12
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And the zip tie wont scracth the piston right?
nope
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Old 08-31-2009, 02:42 PM   #13
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That would not work for me because i have the losi clutch. And the flywheel is not whats moving its just the rod and piston. Im not looking to go to the hobby shop
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Old 08-31-2009, 02:50 PM   #14
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so your collet is not grabbing the flywheel?

Then use the zip tie or you can even flood the engine with fuel and it will hydro lock.
It does not have to be a zip tie. Just using a non metal material(plastic) I have used the end of a tooth brush before.

They do make tools just for your situation but I have found there are many ways to pull it off without spending money.

Just pull the header off and get something in there to stop the piston.
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Old 08-31-2009, 02:57 PM   #15
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Im going to try using something other than a zip tie because it just snaps.
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