'72 50hp won't run???

[jbjennings]

I've got good spark on the spark tester, 150-155psi on both cylinders, checked timing with timing light and it's good, too. It has been huffing and puffing yesterday, but I can't get that out of it today, even with fuel-oil mix in the cylinders or the carb throats. I have no idea why this motor won't start! The reed cages were all cleaned and reeds laying flat as well. The spark plugs look new. I have not tried other plugs but I can't see 2 going out at once. I did get a crankcase full of fuel due to a switched fuel/pulse line, but it's all blown out by cranking over with the plugs out. I also put new upper and lower crank seals on this motor.
ANy ideas would sure be helpful. I'm at the limit of my patience with this thing. I've never had a motor with good compression and spark that I couldn't get cranked....
Thanks,
JBJ

 

[tashasdaddy]

Re: '72 50hp won't run???

those carbs slow speed jets like to be fattened up, instead of running lean. they will not idle perfectly, but will sure run better.