david_rolt
New member
"Hi, Hope that someone can hel
"Hi, Hope that someone can help? I have an 8hp Honda 4 stroke that won't start, I have checked the following: - Compressions (cold eng) 80psi both cyl, plugs have a good consistant spark, stripped carb, all ok no dirt or blocked jets, and manual choke works fine. Have spun the engine over with an electric drill, (approx 1200RPM) strobe indicates plugs firing at approx 12 Deg BTDC. Have checked valve/cam timing, marks line up at TDC. Have pressurised cylinders with air line at TDC no sign of air at intake or exhaust, have turned engine till exhaust valves open and repeated test, good air bubbles appear in my test tank so seems exhaust not blocked. Have tried fresh fuel. Have removed carb and run engine over with drill and held a sheet of paper over the intake, it pulses back and forth, not sure if the back pulse is caused by valve overlap? Have removed inlet manifold and replaced gaskets. Plugs don't seem to be getting wet? Helllp"
"Hi, Hope that someone can help? I have an 8hp Honda 4 stroke that won't start, I have checked the following: - Compressions (cold eng) 80psi both cyl, plugs have a good consistant spark, stripped carb, all ok no dirt or blocked jets, and manual choke works fine. Have spun the engine over with an electric drill, (approx 1200RPM) strobe indicates plugs firing at approx 12 Deg BTDC. Have checked valve/cam timing, marks line up at TDC. Have pressurised cylinders with air line at TDC no sign of air at intake or exhaust, have turned engine till exhaust valves open and repeated test, good air bubbles appear in my test tank so seems exhaust not blocked. Have tried fresh fuel. Have removed carb and run engine over with drill and held a sheet of paper over the intake, it pulses back and forth, not sure if the back pulse is caused by valve overlap? Have removed inlet manifold and replaced gaskets. Plugs don't seem to be getting wet? Helllp"