redgoat
Petty Officer 2nd Class
- Joined
- May 23, 2010
- Messages
- 102
OLD Roch carb hard to start after hard run w/o raising "lift for cold start" lever
My 47-year-old Sea Ray with a 153 cu in 4 cyl. Mercruiser engine and a 2bbl Rochester Carb is hard to start after being run for 45 mins or so. Many times I have to lift the "lift for cold start" lever next to the throttle handle to get engine to start which will increase the throttle speed once the engine starts. Pulling the lever back down to off position will lower the idle speed but the engine will likely die shortly after the shift lever it is put into gear and I move the throttle forward. I've had this problem for perhaps 25 years and am at a loss as what to do.. If I have to stop and restart engine several times while dealing with skiers and tubers this condition worsens. Basically the engine wilI not start unless I use this "choke" lever. I have rebuilt the carb, I use premium gas with a stabilizer and lead substitute, replaced shift interrupt switch, replaced lower shift cable, double thickness on carb gasket, replaced points, plugs, condenser, set dwell, and timing to specs, new fuel pump, new spark plug wires, new water pump, PLUS I run my bilge blower constantly to try to eliminate heat soak. If I just boat for an hour or so without stopping engine more than once, the stalling does not occur upon restart. Does anybody have any ideas about solving my problem with this vintage boat?
My 47-year-old Sea Ray with a 153 cu in 4 cyl. Mercruiser engine and a 2bbl Rochester Carb is hard to start after being run for 45 mins or so. Many times I have to lift the "lift for cold start" lever next to the throttle handle to get engine to start which will increase the throttle speed once the engine starts. Pulling the lever back down to off position will lower the idle speed but the engine will likely die shortly after the shift lever it is put into gear and I move the throttle forward. I've had this problem for perhaps 25 years and am at a loss as what to do.. If I have to stop and restart engine several times while dealing with skiers and tubers this condition worsens. Basically the engine wilI not start unless I use this "choke" lever. I have rebuilt the carb, I use premium gas with a stabilizer and lead substitute, replaced shift interrupt switch, replaced lower shift cable, double thickness on carb gasket, replaced points, plugs, condenser, set dwell, and timing to specs, new fuel pump, new spark plug wires, new water pump, PLUS I run my bilge blower constantly to try to eliminate heat soak. If I just boat for an hour or so without stopping engine more than once, the stalling does not occur upon restart. Does anybody have any ideas about solving my problem with this vintage boat?
