On non starting four stroke, I always begin with valve clearance and cam timing check first ! Then move to a quick leak down test if I find NO problems with valve clearance or cam timing.Hi all.
I just picked up a 2001 350es. Kid let it go for nothing, needs a few minor things but it wouldn't start. It is getting spark, and fuel. I used a shot of starter fluid and it backfired. He said this past year it backfired often. He barely had any oil in it, like sad. It does have a bit of compression but not what it should. Not as much as my 2001 250 recon. Pulls over smooth. I'm thinking the timing is off. Thoughts?