Originally Posted by Ameridacusa
Yanmar 3JH3E ...trouble bleeding engine. Question.! ..are there any high pressure blessed points after secondary filter. No fuel
or air bubbles on #2 injector 1 and 3 OK.! Engine won't stay running after help from starting either spray! As an ex- Caterpillar Dealer..this Gray toy Yanmar..! Needs a coat of yellow paint
.! Help please..my retirement days are getting shorter and I can't leave the dock.!!
Go here for a manual and instructions how to bleed on Page 27:
Technical specifications of previous models - Yanmar Marine
Here is manual:
Looking at the manual, it looks to be similar to my Yanmar 3gmd. You would use the lift pump
to get fuel
to the fuel
filter (engine mounted). Use the bleed screw at the top of this filter to bleed the air (note there is a plastic washer under this bleed screw- replace with new as a crack in it will draw air). Then turn over the engine with starter
(with engine stop cable pulled, and sea water seacock closed- so you do not flood the engine) with the line
going to the injection pump
cracked (at the injection pump
) so you can bleed that air. Once bled to the injection pump
, you will now crack each line
to each injector to bleed the air to those- turning over engine with starter
and stop cable pulled, start with the farthest injector and work towards the injection pump to bleed farthest line
and working forward.
If you can find someone knowlegeable about boat diesels it will make life easier. Also, verify your lift pump is working- these yanmar pumps can be manually operated by hand even when mounted on engine.
The manual for this engine seems to indicate there is an automatic air bleed system after the fuel
filter, so the manual says all you need to do is bleed up to the fuel filter and the auto system should bleed the rest. The question is does you engine have this system and if so, is it working? More reason to get a knowledable Yanmar mech ever if only for an hour or two to show you what is what.