I have a sailboat with a Yanmar
3HM35F. This past Sunday we were making our way across the bay and approaching the channel to head
into the marina. We fired up the diesel
and it started like always. It warmed up, then we proceeded for about 10 minutes at 2500 RPM
, when it suddenly decelerated to 1000 RPM
. I pulled back on the throttle and she died. She acted like air had entered the system, so I bled her, but no air.
We had a friend tow us in. At the dock
I bled the system again, with no luck. There is plenty of fuel
flow to the injector pump
, but taking the high pressure lines off and placing a napkin on top, it only wets the napkin and doesn't blow it off like I would expect. So I suspect the fuel
injection pump has gone bad, but there is no leaking of fuel into the crankcase or outside. I figured I'd pull the pump off per the manual to take it to a shop, but after removing the low and high side lines, plus the 4 nuts that hold it on, it wouldn't come off, so I wonder if I missed something.
Also, just turning the diesel
over a few seconds will emit a smell that almost smells like burning plastic around wires, but there is no evidence of anything burning (smell comes from engine
The diesel has always put out some steam, but not much and it dissipates after a foot or two behind the boat. Sunday there was a little more steam than normal, but not much and it we had just had a cold front come through, so I figured the cooler air had something to do with the additional steam, cause every winter it always steams more than in the summer.
level is the same and there is no water
in the oil
in the coolant
, so I don't think I blew a head gasket
I perform all of my maintenance
and always try to make any repairs
myself, because I want to understand the diesel, so if something happens while I'm away from dock
, then I can fix it, but I'm at a loss and would rather not call a mechanic
if I can help it. Does it sound like the injector pump
? If so, how should I proceed on removal
I greatly appreciate any and all assistance. This boat is my home and I really enjoy changing my backyard whenever I want, so the thought of not being able to leave a dock bothers me.