Search found 2 matches

by tditterline
Fri Jan 22, 2021 12:20 pm
Forum: Trojan Boats Forum
Topic: Onan MCCK 6.5 losing prime
Replies: 2
Views: 2293

Re: Onan MCCK 6.5 losing prime

Several things can cause this , porous hose(s) on the intake side of the pump . A bad seal in the raw water pump can suck air , you may see a water leak there after shut down . And a issue with the vented loop . I'll have too read up on the vented loop- not sure what you mean there. I guess I'll st...
by tditterline
Mon Jan 18, 2021 12:10 pm
Forum: Trojan Boats Forum
Topic: Onan MCCK 6.5 losing prime
Replies: 2
Views: 2293

Onan MCCK 6.5 losing prime

Hi Folks, Have a 79 F-36 with the original Onan 6.5 MCCK on board. runs perfect, but all of a sudden last year it would lose prime- no cooling water coming out of the exhaust. I've replace the impeller but trouble remains. If I manually prime it, it'll pump water like crazy, but after you shut it of...