I read a number of the threads ... we have a Beneteau
50 with the 4jh3-HTE and had similar problems ... it started when we equalized fuel tanks
and then the engine
would start running rough, losing RPMS .. the more load the worse it got.
We wasted 300l of fuel
that we drained out and I gave away -- when we ran the diesel
out of a 25 liter tank it ran fine, then started skipping and losing RPM
. Eventually we pulled the fuel pickup out of the tank and I blew into it -- and it was very hard to blow into -- I then used a piece of spring steel
to clean out the intake pipe -- kind of like a pipe cleaner. It was full of small shards of plastic from the tank.
The intake pipe from Beneteau
is really small -- like 5mm wide ... it seems really small. When in Cyprus
we had a guy tig-weld a 12mm pipe onto the fuel pickup and now all the gook gets sucked up and trapped in the Racor
Fast forward a year we were on a passage
from Sardinia to Sicily
and noticed the engine
skip occasionally. There were a few pieces of plastic in the Racor
filter, but they also found their way into the plastic housing (the turbine mechanism) of the Racor FG500. So with some disassembly and cleaning
I took maybe 1cc of debris out of the Racor and everything returned to normal.
Prior to finding this we had taken the exhaust elbow
off, replaced all fuel lines, fuel filters, polished the tanks
, took the fuel injectors in for service
... and then bypassed the fuel system ... and voila ... we found the problem -- a $20 solution at the welding shop. I wish I could get the $500of fuel back that I gave away.
... but we've put nearly 1000 hours on the motor
since that time and we've been happy.