captain_ed
Regular Contributor
Both engines have stalled, but the worst is the port side freshly rebuilt 440. The engine is perfect mechanical condition after total rebuild. I put new Mallory distributors and Edelbrock 1410 carbs on both motors. The starboard has stalled, but not as much.
The engines start and idle perfectly. I can run at planing speed for as long as I want. The trouble comes when I slow down to anchor or dock . The port engine will stumble and stall after running at 1200 rpm for more that 5 minutes. My wife says she smells gas when the engine stalls. It will not start until it sits for about 5-10 minutes then she fires up and runs fine again? The temps are staying normal, oil pressure and voltage are all normal. Sometimes I can try to rev up the motor in neutral to keep it from stalling it will buck and studder before it stalls out. This is a pain when trying to dock. I am thinking that it is not fuel starvation because it runs fine at planning speeds (3200 rpm). I had water in my fuel years ago and have replaced the fuel tanks since, but it reminds me of how the engine is acting. I don't think it is a fuel issue with new tanks,lines,fuel pumps etc.. My fuel filters don't show signs of water.
A friend thinks that the edelbrock 1410 (750 cfm) carb may have the floats set too high? He said that it will dump fuel into the engine as the heat of the engine expands the gas and the carb bowl overflows into the engine at idle speeds and floods the engine. I pulled a spark plug and it was clean and looked like perfect heat range no oil fowling or carbon fowling at all. I never messed with the float setting from the factory, I just bolted them on ,set idle mixture and they ran great. Does this sound like it might be the problem????
The engines start and idle perfectly. I can run at planing speed for as long as I want. The trouble comes when I slow down to anchor or dock . The port engine will stumble and stall after running at 1200 rpm for more that 5 minutes. My wife says she smells gas when the engine stalls. It will not start until it sits for about 5-10 minutes then she fires up and runs fine again? The temps are staying normal, oil pressure and voltage are all normal. Sometimes I can try to rev up the motor in neutral to keep it from stalling it will buck and studder before it stalls out. This is a pain when trying to dock. I am thinking that it is not fuel starvation because it runs fine at planning speeds (3200 rpm). I had water in my fuel years ago and have replaced the fuel tanks since, but it reminds me of how the engine is acting. I don't think it is a fuel issue with new tanks,lines,fuel pumps etc.. My fuel filters don't show signs of water.
A friend thinks that the edelbrock 1410 (750 cfm) carb may have the floats set too high? He said that it will dump fuel into the engine as the heat of the engine expands the gas and the carb bowl overflows into the engine at idle speeds and floods the engine. I pulled a spark plug and it was clean and looked like perfect heat range no oil fowling or carbon fowling at all. I never messed with the float setting from the factory, I just bolted them on ,set idle mixture and they ran great. Does this sound like it might be the problem????