I am looking for a good way to troubleshoot this.
I have a westerbeake 4-108. Rebuilt in 2012. Over the last two summers, I am noticing that if i run at 2k RPM
is more susceptible to dying. Symptoms are definitely air in fuel
starts sputtering, and dies within a minute. If i throttle back when i first hear it , sputtering stops and I can get away without engine dying. It happened 3 times in the last 2 years. And each time if i bleed it, it starts right up.
Twice it happen on bouncy seas, and fuel tank
about 1/4 - 1/2 full. I have a small 20gal rectangular tank. I wonder if it could have sucked air that way?
Some more info...
Primary fuel filter
R20S, and secondary is the wix 33166.
My return goes back to a tee at the vent fitting.
The first time it happened, i found that mesh strainer at the intake tube was completely clogged. Since then i cut off the mesh, so my tube is a bout 1/2" shorter. When it happened the second time, tube was free and primary filter did not appear to have too much crud in it.
I am wondering if at higher RPMs the line after the primary filter lets air in somehow. Maybe its not big enough to supply adequate fuel
As long as I motor
at no more then 1800RPM, engine runs fine. In fact it never died. I don't have an hour meter on it but I put about 100 hours per year. Exhaust
is clean. No fuel in the water
, and I have the usual startup smoke, some condensation
on cold days, but under normal load, and when warmed up, exhaust
is always clean. Engine runs at about 180F.
Thanks for any feedback.