The motor runs great above 1200 rpm. Anything below she pops like back pressure in the exhaust and then she dies. Kind of a pain to start have to use the warm up lever to start then quickly back off before the rpms jump up. The gas tank had water in the fuel. So it was drained cleaned and filled with fresh gas. The fuel filter pump and lines where purged till fresh fuel came out of the three hoses where the carbs hook up to the fuel lines. The sync part of the overhaul was adjusted to correct specs. Now with the timing. On this model it says its controlled by the cdi module and mechanical linkage. The setting in the book are 6-8 deg atdc for full retard. The full advance was 24-28 deg atdc I believe. Book says to move linkage to full retard and check if in spec. Same with full advanced. My knowledge of checking timing degrees is to run the motor an hit the flywheel to read the number. Motor wont run anywhere close to idle so I cant check full retard. And there is no way to check full advanced on a water hose. Am I an idiot or is there a different way to time this motor. I'm almost betting that its timing. Gaskets look fine. Fuel filter is new. No water fuel separator yet. Spark plugs look black and some times wet. Little bit of oil on the outside of the plugs seat ring. After I tried figuring out the timing and didn't think I got anywhere, I put the boat in the water to see how she ran under load. Same results nothing under 1200rpm. Smooth above. Pulled the plugs out before flushing the motor and they where dry and nice and tan. Looked like they where burning clean. Piston head looked drier and not so black and wet. the cylinder walls nice and shiny lubed and cleaned. Anyone Have Any Suggestions!