Fuel Problem ?
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Have a pair of 425 Mercruisers in a Cafe Racer in the UK.
Having a problem with one engine, it will not run without having to keep pumping the throttle lever and will only reach about 3000rpm under load. Have changed the filter and fitted new lift pumps last season, pressure guage runs at 6psi. Feels like fuel starvation and "pops back" through air filter.
Any thing I should check in the carb??. Ran fine last year.
Having a problem with one engine, it will not run without having to keep pumping the throttle lever and will only reach about 3000rpm under load. Have changed the filter and fitted new lift pumps last season, pressure guage runs at 6psi. Feels like fuel starvation and "pops back" through air filter.
Any thing I should check in the carb??. Ran fine last year.
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Holley, I think 4150. I have not checked the filters on the feed into the carb itself - do you think this could be a possible ?
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Have a pair of 425 Mercruisers in a Cafe Racer in the UK.
Having a problem with one engine, it will not run without having to keep pumping the throttle lever and will only reach about 3000rpm under load. Have changed the filter and fitted new lift pumps last season, pressure guage runs at 6psi. Feels like fuel starvation and "pops back" through air filter.
Any thing I should check in the carb??. Ran fine last year.
Having a problem with one engine, it will not run without having to keep pumping the throttle lever and will only reach about 3000rpm under load. Have changed the filter and fitted new lift pumps last season, pressure guage runs at 6psi. Feels like fuel starvation and "pops back" through air filter.
Any thing I should check in the carb??. Ran fine last year.
The cure was to slowly bring the motor up to the good running one, raise the rpm and then give it a bit more throttle, and after a half hour + It snapped out of it..WATER,, I also cleared the filter several times.
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pop the bowl off it its a holley and clean the main jets. check the accelerator pump for squirt. check anti-siphon ball in the squirt tower. rest float level if adjustable.
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Nigel - sorry to hear you are having troubles. Is this the first run of the season? Sounds like Carb problems. If it is the first run of the season did you fog it before you stored it?
Eric
P.S. - Going to be in the UK in mid-September. Theale. If things aren't too busy and you are close maybe we'll meet for a drink and some boat talk!!!!
Eric
P.S. - Going to be in the UK in mid-September. Theale. If things aren't too busy and you are close maybe we'll meet for a drink and some boat talk!!!!