Yanmar Starting

[noelex 77]

Originally Posted by gvolos

Hi all. Could any of you nice fellows that have experienced this problem tell me if they have found a permanent fix?
Sounds like a mind blower.
Thank you.

Still no solution.
Yanmar did get in touch with me see
http://www.cruisersforum.com/forums/...ive-42798.html
but after 2 weeks I have heard nothing more.

[gvolos]

What a shame. Please keep us posted if anything comes up
Thank you and wish you the best.

[Sabbatical II]

I've had similar problems with Yanmar 2QM15. Eventually I found that the fuel return lines from the injectors were routed back into the fuel filter. I thought this was strange, but apparently it's not uncommon. I re-routed my return lines straight to the tank and have had no more problems. I have seen a new 54hp Yanmar at a boat show that plumbed the return lines into the filter. I am currently building a boat fitted with a 75hp Yanmar and the builder tells me he always sends the return to the tank.

Greg

[gvolos]

Sounds like a good idea, and since it worked for you, perhaps someone else should give it a shot also and see if this works for him.

[daddle]

On some installations the fuel return line to the tank can drain fuel from the return line and let air get up towards the injectors or pump. The fix for this is to have the return tube extend to the bottom of the tank. This issue is indicated when a diesel seems to need bleeding, or is slow to start, after sitting for a while. Most installations don't seem to be sensitive to this but enough are that I've seen it as an installation requirement in some manuals. Just a tip.

[jarod]

Has anyone found resolution to this defect on the Yanmar 54hp (4jh4ae)? I have been experiencing the exact same issue with a virtually new motor. I repowered 5 months ago and have 60 total hours on the engine. The engine starts ok sometimes... generally it stalls after a few seconds of running and has to be cranked and throttled way up for it to restart. It seems to run good once going, but not happy having this issue on a brand new Yanmar. It sounds like the filter housing change was not a permanent fix?

Thanks

Jarod

[noelex 77]

These are the symptoms I am experiencing, it sounds like you have the same problem.
Replacing the secondary filter housing seems like a permanent fix providing there is no other air leaks, at least from the reports I am hearing. As I have redone my entire fuel system and replaced every component at least once so I am expecting a permanent fix from the change.
Yanmar are sourcing replacement components, but at the moment they are out of stock.
I will certainly report on the success (or otherwise) of the change.

[noelex 77]

I have posted a new thread with hopefully my solution to the problem
http://www.cruisersforum.com/forums/...tml#post525899