So I recently bought a 1981 JS440. It has a westcoast pipe, supertrapp muffler, 20cc head (i think its stock and has been shaved and is stamped w/20cc and the shop name), aftermarket flywheel (dont remember the brand at the moment), round body carb (BN38 ???), westcoast exhaust manifold.
Things I have done so far:
Cleaned fuel tank
Replaced all fuel lines
New spark plugs
New fuel filter
Checked "check" valve
Verified spark on both plugs
Checked compression with questionable autoparts store loaner ~120psi on both jugs
Replaced head gasket
Checked pistons, rings, and jugs - all look good
Reset timing to stock (index mark aligned with flat spot on case)
Cleaned carb (looked spotless inside and no damage at all)
New, fully charged battery
Visually checked stator - all looks good, no bad wires that I can see
Disconnected and verified correct operation of kill switch w/ DMM
Inspected everything inside elec box - no visual damage, and everything looked new
The ski has "coughed" twice on two separate days but that's all I have been able to get out of it. I've tried both premix and starting fluid in both the carb and directly in the plug holes - nothing.
Any help would be greatly appreciated as I'm getting close to slapping this back on CL and trying to get what I have in it back.