RCU Forums - View Single Post - when to replace the sleeve and piston?
View Single Post
Old 01-22-2011 | 12:48 PM
  #6  
1QwkSport2.5r's Avatar
1QwkSport2.5r
 
Joined: Oct 2006
Posts: 10,530
Received 105 Likes on 93 Posts
From: Cottage Grove, MN
Default RE: when to replace the sleeve and piston?


ORIGINAL: Telecaster


ORIGINAL: 1QwkSport2.5r

ORIGINAL: Telecaster

This one still has the resistance and there is no scoring, but I have to heat the crap out of the engine with a heat gun or it will just free spin when I hit the EZ start as if it were flooded, but it's not.

It's an older engine (trx .15) that I resurrected from the dead. It runs great once it's started but takes forever to start.
Does the ez-start just not turn the engine or is the engine really really stiff to turn over unless its heated?

Worn out Piston/Liner symptoms to look for: Hard to start WARM, Overheats no matter the fuel mixture, extremely boggy.
It's like the EZ start isn't turning the engine, but the engine is not overly tight or anything. It makes a couple of poofs as soon as I hit the button and then freespins. As I heat it up with the gun it starts turning over like normal but still takes a long time to start up.

If the ez-start is turning itself, but the engine is not turning then either something is wrong with the EZ Start gears (not likely) or the One-Way Bearing is slipping on the starter shaft of the engine. The pro .15 I had was notorious for getting cracks in the OWB causing slippage. If its saturated with oil it can slip too. Personally, I'd pull the ezstart off, clean out the OWB with brake cleaner or carburetor cleaner and put it back in. OWB's should be installed dry - no oil or they can slip. If the starter shaft is extra shiny, I'd get some 800 or 1200grit sandpaper and lightly scuff the surface of the shaft. All you're trying to do is rough up the smooth surface so the OWB has something to grab on to. If none of this works, replace the starter shaft AND OWB at the same time.