What's up with my 502 fueling?
07-03-2012, 08:33 PM
#1
Registered
Thread Starter
What's up with my 502 fueling?
Hey folks
My 1995 Formula 271 has an efi 502.
It has done something strange 2 years in a row, but only on my first day out.
Both days I putted around for a while checking things out
and gradually increasing rpms and returning to idle.
Both days, on my first attempt at wot the engine just quit
at about 4000 rpm.
Last year it took the longest time to restart, atleast an hour, I had to get towed to a buoy. It eventually re-started and ran perfect for the day and the rest of the year.
This year , July 1, same shut down but it would restart and stumble badly for about 10 seconds and quit again. Seems to be starving for fuel. After about 20 minutes of restarts and quits, it fired up and ran perfect for the rest of the day.
The only thing I did both days was remove and drain the
spin on fuel separator. The fuel that came out seemed clean, a little bit of crude, but nothing you would expect to cause an issue.
It did not immediately restart after the separator was re-installed either day.
Any ideas on how to avoid this re-occuring next year.
My 1995 Formula 271 has an efi 502.
It has done something strange 2 years in a row, but only on my first day out.
Both days I putted around for a while checking things out
and gradually increasing rpms and returning to idle.
Both days, on my first attempt at wot the engine just quit
at about 4000 rpm.
Last year it took the longest time to restart, atleast an hour, I had to get towed to a buoy. It eventually re-started and ran perfect for the day and the rest of the year.
This year , July 1, same shut down but it would restart and stumble badly for about 10 seconds and quit again. Seems to be starving for fuel. After about 20 minutes of restarts and quits, it fired up and ran perfect for the rest of the day.
The only thing I did both days was remove and drain the
spin on fuel separator. The fuel that came out seemed clean, a little bit of crude, but nothing you would expect to cause an issue.
It did not immediately restart after the separator was re-installed either day.
Any ideas on how to avoid this re-occuring next year.
Last edited by nsformula; 07-03-2012 at 08:37 PM.
Charter Member
07-05-2012, 06:31 AM
#6
Registered
Thread Starter
the seawater pump.
Mine may be a vst vapor lock issue, but I only happens once a year, which makes me think there is another issue.
I would like to resolve this for safety if nothing else, no fun bobbing aound with container ships cruising by.
I did a search on vst and there is a screen that can be cleaned, probably won't hurt to do that.
Last edited by nsformula; 07-05-2012 at 07:16 AM.
