Originally Posted by Dockdozer
I have a new Yanmar 4Jh4AE. It has just 256 hrs. I have found that you have to use the glow plugs to get her to start every time you start her, or rev her up a little. Is this right? Every other diesel I have had experience with after warmed up will start in a second. Ok I first start of the morning, glow for at least 20 sec, starts right away.(It is in the 80s or 90s) Motor the boat for 45 min to 1hr, to deep water. Engine off sail for 2 or 3 hrs. I reach down and hit the starter and she will start for a few seconds and then die. Now I can glow her again and or sometimes she will still not start until I rev her a little. To me this diesel should be warm for a long time, and not have to use the glow plugs, or the throttle. Now I did talk to a diesel injection guy that said the with the new diesels that are coming out now, that they could be cold natured.
I am not very cold natured, when I reach for the key and she will not start!!!!!!!!
Please help guys!
Your loosing fuel prime.. some where there is an air leak and it allowing fuel to return back to the tank leaving the inj pump air ridden requiring the engine to spin longer to " prime back up".. Does it spit and sputter until you give it a bit of throttle and clear up? A little smoke " or it could be a bunch"??
Check any anti back flow devices on or near the fuel pump/or filters.. Change any filters lately? Use a cheaper or different fuel filter? replace any fuel lines? Did not get or dropped the copper gasket off of a fuel through bolt??
Just trying to help.. But this is what i do day after day for 22 years.