Have 1985 sailboat with Universal M25 diesel. She fires up just fine but stalls out after running 20 min. And unable to restart. Happened once before, we .bled injectors and replaced fuel filter, worked for short period.
Universal M25 Cuts out after 20 Min Running
- Thread starter strangemagic77
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Strangemagic 77 did you replace both fuel filters? My 1984 m25 did the same thing run for 20 to 30 min and stop. This was on my sea trail to buy her. When I had the work done once bought I had the engine serviced and I could swear the mechanic said he replaced both fuel filters and that was the issue.
You might want to look at our C34 Critical Upgrades page and our tech wiki with lots of M25 engine info. Check to see if the pickup screen in your fuel tank has been removed.
http://c34.org/bbs/index.php/topic,5078.0.html
the wiki link's up at the top
Good luck.
http://c34.org/bbs/index.php/topic,5078.0.html
the wiki link's up at the top
Good luck.
If you've checked your main fuel filter then I would check for two other places: there is a small filter screen located on the incoming side of many fuel pumps that has very fine mesh & can clog. U may also have a partial clog in your fuel line or fuel pickup tube at the fuel tank. Many 70's & 80's era fuel tanks had a small piece of mesh screening located at the end of the fuel pickup tube in the fuel tank to act as a pre filter. it should have been called a pre clogging device, & if its there, should be thrown away. Your running for 20 minutes definitely sounds like a very familiar fuel clog. My previous boats Yanmar diesel did the same thing. It would run for about 20 minutes which is the amount of fuel in your fuel filter cup & lines, because it was clogged at the tank from the pre filter mesh screen.
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