And I still don't know whats wrong with my 250 Engine. Everything inside it matches my workign Engine piece by piece. Not one part of it is in bad condition *except the carb-to-engine piece* The piston has gas/oil coating the top, but I don't think that would be the reason its hard to pull!? The piston does not hit the spark-plug head and the flywheel is still good all round.. its in better condition than my other 250's Engine. Im at a lost now. I can get it to run, if I want to pull the starter with all my strength *before... it took one arm* and prime the head with gas, but even then it dies after about a minute or so. Should I cut my losses and sell the FL250 like I was planning to if I couldnt get it to run?

http://www.pilotodyssey.com/PO/viewtopic.php?t=6683

So the Engine is hard to turn over when its not trying to build compression (the plug is out) ?

When the plug is out, then Engine will pull over fine and easy like it was. But when its put back into the head its hard to pull and hurts my TWO arms to do it.

Does it pull any easier with with plug in and the ignition off ?

Take a compression test let us know what the compression is.

With the ignition off its...the same it seems. I can take a compression test tommorow when I get off work and get something to test it with, haha.

The compression is about 128-129. I think that's how much it had before too.

Nice descriptions, good details, don't get discourage, after your done you will be a 2 stroke mechanic better than most.


good news you are real close, actually you are there! you have a running motor (( Internal Combustion Engine ? ))!

bad news, sounds like carb or fuel delivery issues and they can be fickle.


You have compression and spark you just need fuel, go back to your carb and find out whats wrong, have you cleaned it copmpletely including jets and float valve? , is fuel getting to carb?

on the rip your hand off part, I say your timing is very close if not before TDC (Top Dead Center) top dead center, this means the spark is firing one micro sec before it hits TDC (Top Dead Center) and sometimes kicks back ripping off your arm, I don't know jack about 250s but if you can adjust timming do so


ye shall overcome

Well i decided to check one thing... one stupid thing that I didnt check... the bloody piston rings! And they are broke =\ I took the majorily broken one out and OMG it now turns over as easy as ever. I still guess I need new ones. And im not gonna chance trying to run it without rings. Also on the very bottom was like 1/4 cup of OIL! I dunno if that's good or bad, but i drained it out.

Hare- The Engine wouldn't pull over easy even when I pulled it out of the odyssey. Oh and yes. the carb has been COMPLETELY rebuilt. =) Thanks though, you taught me something I didnt know lol.

That sux.

Have any pictures?

What caused the rings to break?

Once apart take detail pics and post we will help you figure out (CSI) why your Engine died.

Most of the time when a ring breaks it does some sort of damage to the cylinder the pics will probably show this damage.

I can post the pics when I get off work tonight... ugh. I have no idea what could have broken them, but one is broken in 3 places and the other is broken in half. I took some pictures this morning so I should be able to upload them all tonight. I didnt see any MAJOR damage, but this would explain why it was hard to pull if the rings were rubbing against the outside of the piston wall huh?

The only time I seen broken rings in a 250 came form the ends of the rings getting caught in a port opening, this happen by the locator pins coming out and allowing the ring to rotate around where the ends of the ring could then get caught in the port opening.

Sorry but this is starting to sound a bit screwed up.

you had 130 psi with broke rings? and you could not feel or hear a horrible grinding noise? no chunks of metal on plug or anywhere else until you checked the rings?
how did you check the rings?

yes definately need pics



btw
where you from ? where do you ride alot? What other toys you got?

Oh I could feel and hear the noise. that's why it was so hard to pull I think. The rings werent off the piston so maybe that's how I still had compression? Nope there wasn't any other chunks of metal anywhere. Just a butload of gas/oil in the bottom end. I checked the rings when I took the cylinder head off and saw that they rotated easily. haha. Im from Australia originally, I ride around Easten WA near Ellensburg and Sun Lakes right now. I have a Challenger 250, Honda Pilot, and a Banshee. Heres the pictures =)

good pics

I can honestly say i have never seen that and i've seen alot of damage.


what does the cylinder look like how bout some pics of that too? do you have a way to measure piston vs cylinder clearance?

man that a good thing you caught it before the rings got loose.


lets see that Challenger!

The cylinder looked fine to me, not all that bad. I have a pic of that too. I don't have a way to measure... hell I dunno if it is meaurable. Do you know how I can get new rings? Oh and also is a pic of my home-made wannabe Challenger...that needs a new axle still =\. I have 2 Odysseys and I cant even drive them. UGH!

Oh heres my Challenger Style Odyssey.