Rob the weekend warrior
Seaman Apprentice
- Joined
- May 24, 2012
- Messages
- 32
boat-1989 bayliner capri 2150 bowcruiser
engine OMC 5.0-chevy 305
outdrive-cobra
My problem only happens at idle- at off-idle it runs great, I idle down and its like I turn the key off if i try to restart it, it cranks and cranks nothing, nada-as it gets cooler it will start firing but wont "catch" until it gets about 30 degrees cooler. temp gauge works and runs right up to about 160 but never gets hot. I have to wait for the motor to cool and then it starts right up like nothing happened. I talked to a speed shop and they suggested that it was the coil, but I tested for spark, and had good spark. I then got the mallory troubleshooting leaflet and dist is good. Good spark when warm. Went to carb, had it rebuilt-ran it, same problem, figured maybe as the intake air gets warmer engine goes to the rich side, checked plugs-BAM-BLACK! but not caked up. Cleaned them leaned the carb out (quadrajet-3 turns out=real lean) ran it, same problem! pulled plugs-white! checked spark, good spark. Accelerator pump will spray fuel-checked that, checked fuel pressure-good, opened carb checked float level-good, new float. Okay, heres the funny thing-advanced the distributor about 4 degrees and the problem seemed to go away-will let you all know after running this afternoon. I thought AH-HA it must be a broken spring on the manual advance dist-nope, all good, free and well lubed. I dont know-im gonna try running it a few degrees advanced and see-it cranks hard but runs smooth. If this solves it, I will just order a high torque starter and always run 91 octane.
okay was on the water today. I feel that it is the distributor. I thought it was the coil so I bought a new one. Same problem. Replaced with old coil-same problem. Ran it around a bit (with the old coil), throttled to idle-dead. Felt coil-normal heat, felt intake-normal heat, coolant gauge @165. Felt dizzy-WOW SMOKING HOT! reached into the good old ice chest, grabbed a miller light and a block of ice and threw it on ol dizzy, and BLAMO within 5 mins the ice was all gone and we were heading back to the dock! Dunno if it is the module or what but I think its in that dizzy. Either that or I gotta get a water jacket for the dist. I did pull a wire from a plug and set a new plug on the intake to check for spark, and I had a little-very little, and apparently not enough.
engine OMC 5.0-chevy 305
outdrive-cobra
My problem only happens at idle- at off-idle it runs great, I idle down and its like I turn the key off if i try to restart it, it cranks and cranks nothing, nada-as it gets cooler it will start firing but wont "catch" until it gets about 30 degrees cooler. temp gauge works and runs right up to about 160 but never gets hot. I have to wait for the motor to cool and then it starts right up like nothing happened. I talked to a speed shop and they suggested that it was the coil, but I tested for spark, and had good spark. I then got the mallory troubleshooting leaflet and dist is good. Good spark when warm. Went to carb, had it rebuilt-ran it, same problem, figured maybe as the intake air gets warmer engine goes to the rich side, checked plugs-BAM-BLACK! but not caked up. Cleaned them leaned the carb out (quadrajet-3 turns out=real lean) ran it, same problem! pulled plugs-white! checked spark, good spark. Accelerator pump will spray fuel-checked that, checked fuel pressure-good, opened carb checked float level-good, new float. Okay, heres the funny thing-advanced the distributor about 4 degrees and the problem seemed to go away-will let you all know after running this afternoon. I thought AH-HA it must be a broken spring on the manual advance dist-nope, all good, free and well lubed. I dont know-im gonna try running it a few degrees advanced and see-it cranks hard but runs smooth. If this solves it, I will just order a high torque starter and always run 91 octane.
okay was on the water today. I feel that it is the distributor. I thought it was the coil so I bought a new one. Same problem. Replaced with old coil-same problem. Ran it around a bit (with the old coil), throttled to idle-dead. Felt coil-normal heat, felt intake-normal heat, coolant gauge @165. Felt dizzy-WOW SMOKING HOT! reached into the good old ice chest, grabbed a miller light and a block of ice and threw it on ol dizzy, and BLAMO within 5 mins the ice was all gone and we were heading back to the dock! Dunno if it is the module or what but I think its in that dizzy. Either that or I gotta get a water jacket for the dist. I did pull a wire from a plug and set a new plug on the intake to check for spark, and I had a little-very little, and apparently not enough.