Yanmar 2GM20F Failure - reality check needed

Mar 6, 2008
Catalina 1999 C36 MKII #1787 Coyote Point Marina, CA.
If I may guess, the problem is not fixed yet. Your observation of no fuel in the primary indicated that fuel is not flowing into the filter fast enough. This indicates blockage between tank and filter. In my case it was blocked at the primary filter bracket. Remove and clean the fuel path.
Sail La Vie | 1999 Catalina 36 MK II to see how I fixed my fuel filter blockage.
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Sep 21, 2020
Oday 28 Westbrook
@DougM Engine is not original to boat. Much newer. I inspected lines over weekend. Everything appears normal.
@JoeWhite Perhaps. We did a test under load this weekend - 1 hour X2. Nothing weird, no whining or frequency change. Agree that belt had nothing to do with fuel (if it was fuel).
I will keep monitoring for now.