My 90 sp has had some changes before I got it and it hasnt ran right so I have been troubleshooting and I am kinda lost now. First off it has 137 psi compression in both cylinders. It has a sbn carb on it that has been rebuilt. It will start and run it just doesnt plain for a long time. When I get it started it will idle somewhat smooth.But it starts spitting sometimes and what looks like and smells like exhaust come out between the pto flywheel and the block.I did find my rotary valve was off and I have it set at 132 thats what I heard but found on sbt 115 so could my timing still be off? And why is it building crankcase pressure to come out there? And why is it only sometimes there isnt a pattern to it?
:banghead:
:banghead:
