M
mbosarge
Guest
"i have a 260hp merc installed
"i have a 260hp merc installed in starboard (RH rotation) in a twin installation. engine(s) were recently rebuilt < 10 hrs running time ago. star motor initially ran OK - now is running on 4 cylinders. others have been in engine compartment connecting throttle and gear controls for tower (all connections look good though). Non performing (NP) cylinders are #1,4,6,7 (every other one). i pulled plug wires at distubutor (HEI ignition) while engine running for these NP cyls and they make no difference in the sound or RPM of engine. ran comp test on NP cylcs - 150# consistent. pulled plugs and watched spark at plug ... all spark seems weak to me. swapped ignition amp from port motor ... same deal still running on four and port motor is fine - so niox the ig amp. i have NOT swapped ig coil and dist internals - YET. the carb on this mootor gave us problems in the beginning with spitting back through. Any ideas? cross fire? if ignition prob how is it running on 4? fuel? HELP! I always get the ones that aren't on the troubleshooting diagram."
"i have a 260hp merc installed in starboard (RH rotation) in a twin installation. engine(s) were recently rebuilt < 10 hrs running time ago. star motor initially ran OK - now is running on 4 cylinders. others have been in engine compartment connecting throttle and gear controls for tower (all connections look good though). Non performing (NP) cylinders are #1,4,6,7 (every other one). i pulled plug wires at distubutor (HEI ignition) while engine running for these NP cyls and they make no difference in the sound or RPM of engine. ran comp test on NP cylcs - 150# consistent. pulled plugs and watched spark at plug ... all spark seems weak to me. swapped ignition amp from port motor ... same deal still running on four and port motor is fine - so niox the ig amp. i have NOT swapped ig coil and dist internals - YET. the carb on this mootor gave us problems in the beginning with spitting back through. Any ideas? cross fire? if ignition prob how is it running on 4? fuel? HELP! I always get the ones that aren't on the troubleshooting diagram."