2001 800 RMK Hard to Pull Start
Well, here's the problem: I went to pull my starter rope on my 800 RMK, and the thing seems to "plug" over with a lot of effort. What I mean is I pull hard and then seems like its compressing really hard, then breaks loose. It sort of seems like when the pistons get to the top of the cylinders it gets really tough to pull the rope.
What I've done so far is pull the carbs and boots checking for leaks, and the reeds, pulled the pipe and looked for broken pistons/skirt, and dropped some oil down the spark plug hole to see if I could ease the pull. I held my finger on each piston and spun the clutch and everythings moving like it should--no slap or wobble either.
The problem doesn't appear to be a seized engine, as I can turn the clutch by hand with ease. I can pull the rope with the spark plugs removed and it spins like a champ. I put the plugs back in and it's hard again. It seems like there's something going on when each piston reaches the top of the stroke for compression. Like there's way too much compression or something.
I left the pipe off and tried pulling with no plugs and added some 2-stroke oil just to make sure everythings nice a lubricated. Spins like a champ. No sounds, scratching or any noise coming from the engine at all. i can hear the compression and intake stroke, and there' plenty of compression--running like 135-140 just a little less than the manual says at 145. I can even hear the suck on the reeds--oh and checked them too to make sure they weren't cracked.
I had this sort of thing happen on my 99 700 RMK last year right before I took it to the dealer for annual service. Got it back and they said they drained the engine of fuel. So thinking this might be the problem, I pulled the drain plugs and just a weep of fuel came out. Put them back in and nothings changed, all the same problems. Tried leaving them out and spins jsut as nice as with the spark plugs removed.
Maybe there's some sort of bypass going on here?
Could a leaking crank seal do this?
What about a broken piston?
I'm stumped. The shop manual says if the engine is hard to pull, the "plug" on the engine is removed or out. I have two drain holes on the sled under the exhaust pipe, but is there a "plug" somewhere else that allows air into the case?
I don't see any scoring, scratches or anything like that anywhere within the engine. I haven't pulled the jugs or the head to look in there, but I guess that's my next stop if it's not easily fixable.
2001 RMK 800