Honda Odyssey and Pilot Forum

Thanks for the help, and sorry I have not gotten back sooner.  Things got a bit busy with summer vacations.  That compression number is higher than I expected given the slow cranking speed.  I am sure that the cylinder and rings have some wear.  The ignition is a CDI, and I have good spark with the plug out.  If I have time I will put a secondary ignition scope on it to see if I have good spark under compression in the cylinder.  It seems like the exhaust problem could be likely.  I will try pulling off the muffler.  If there is any interest here, I made some captures with a scope of how the ignition works.  When I first saw this thing, it had good fire, but at the wrong time (I used the scope to verify this).  I found that the little trigger winding under the flywheel was installed backwards.  Turn it around and it started right up and ran great.  The owner had it for a few days before it died and he brought it back.

I am trying to help a neighbor out with his fl250.  He bought it in pieces.  After putting it back together, it did not run.  He brought it to me.  I fixed some ignition problems and it ran great.  He took it back and after just a few days, it died while driving and would not restart.  At first I thought we had a fuel pump issue, but I cannot even get it to fire if I dump a bit of fuel into the cylinder.  I think I have good fire.  I am not sure how this thing works internally.  It doesn't seem like I have any suction when I put my hand over the intake side of the carb.  When I do this, I feel pressure and my hand gets covered in fuel.  It also does not seem to be getting the fuel from the crankcase into the cylinder.  When i crank it for a while, the plug still comes out dry.  It feels like I have good compression when I crank.  The pull starter feels about the same as it did when it was running well.  Any suggestions would be great.  I am an auto mechanic, and I would really rather avoid anything 2 cycle.

Brent