Originally Posted by Andrew H
I'm having a problem with a Yanmar
3GM30F. I had the water pump
rebuilt- the bearings were shot. After the rebuild
, I reassembled everything, fired up the engine
and it worked just fine. Good flow of water from the exhaust, smooth running, no overheating alarm
I let it run for about 5 minutes, shut it down and replaced the raw water
hose with a hose into a bucket of antifreeze. Fired it up again and... nothing.
I tried a few different things, then took everything apart again and examined the pump. It seems fine... the impeller spins when I turn the pulley, no hoses seem to be collapsing, nothing looks different.
I'm stumped- I don't understand why it would work
well until being shut down and then just quit.
Has anyone else encountered this? I'd sure appreciate hearing about how I can fix this pretty frustrating problem.
Gallon bucket w/a garden hose attachment plumbed into the bottom of the bucket.
Other end attached to the raw water
inlet side, raise the bucket ABOVE the raw water pump
, even higher if possible.
Pour the PINK RV ANTIFREEZE ONLY, into the bucket.
Use propylene glycol based antifreeze only, for this!
It'll suck it down quickly, but you should only need a gallon or so.
You'll know it's thru when you see it come out pink from the Exaust ThruHull.
SV Cloud Duster