Post by barneyrubble on May 23, 2013 23:06:44 GMT -5
tvnacman - the plug is brown, it's about the same color it was when I was running the OE piston. I still have the oil injector connected AND I mix a little oil in when I fill it with gas.
alleyoop - I have a set of numbered jets and if I go up to a
it has absolutely no power and runs like crap. If I go down to 
, it's got plenty of power, but it gets 'burning oil smell' hot. I I think the main jet is OK. I have done a couple of different plug chops and it always been to look best and run best the way it is.
skuttadawg - the carb is off from a ZX which originally came with a 35, I have a 40 and 42, and when I use either one ... from a dead stop it just bogs down until its going fast enough to rely on the main jet. With the 38, it takes off pretty good. I have checked for leaks: I sprayed carb cleaner all around when it was running and the engine speed didn't change.
alleyoop, scootnwin, and skuttadawg's advice helped me figure it, though it's no consolation to my pride.
She's back up and running again.
I don't have a compression tester so I did the ole 'finger-over-the-spark-plug-hole' test, which showed compression. I did it a few times and it always felt like there was enough.
When I said I checked the piston and cylinder, it was true. I was doing it without my worklight (bulb burned out) so I could only 'feel' the bottom of the piston. When I got home and was getting ready to put it back together I decided to just pull if off and do a magnaflux test on it to check for cracks.
When I got it off and rotated it around to the bottom, there was the undeniable evidence; piston scored beyond repair and bottom ring stuck in the groove.
I put the OE stuff back on, just to see if it would run ... 2 kicks and she fired right up. Now I've just got pick up some new gaskets and I can at least use it as it was before.
Just want send a shout out to the folks who offered advice.
alleyoop - I have a set of numbered jets and if I go up to a
it has absolutely no power and runs like crap. If I go down to 
, it's got plenty of power, but it gets 'burning oil smell' hot. I I think the main jet is OK. I have done a couple of different plug chops and it always been to look best and run best the way it is.skuttadawg - the carb is off from a ZX which originally came with a 35, I have a 40 and 42, and when I use either one ... from a dead stop it just bogs down until its going fast enough to rely on the main jet. With the 38, it takes off pretty good. I have checked for leaks: I sprayed carb cleaner all around when it was running and the engine speed didn't change.
alleyoop, scootnwin, and skuttadawg's advice helped me figure it, though it's no consolation to my pride.
She's back up and running again.
I don't have a compression tester so I did the ole 'finger-over-the-spark-plug-hole' test, which showed compression. I did it a few times and it always felt like there was enough.
When I said I checked the piston and cylinder, it was true. I was doing it without my worklight (bulb burned out) so I could only 'feel' the bottom of the piston. When I got home and was getting ready to put it back together I decided to just pull if off and do a magnaflux test on it to check for cracks.
When I got it off and rotated it around to the bottom, there was the undeniable evidence; piston scored beyond repair and bottom ring stuck in the groove.
I put the OE stuff back on, just to see if it would run ... 2 kicks and she fired right up. Now I've just got pick up some new gaskets and I can at least use it as it was before.
Just want send a shout out to the folks who offered advice.
main and 38 pilot. And yes, I have tried changing the air ratio screw, but it always runs best at the same setting.