I'm coming up on my first maintenance
(50 hours) on my Yanmar 1GM10
and I'm required to drain the water
separator. I've found an excellent website which describes this (as well as bleeding the system).
Question: After draining this water
separator, will I need to bleed the engine
I find very little information on my water separator (a Yanmar
4230B). There is a pump atop this device. Question: what exactly does this pump do?
Lastly, on one of the numerous forums
, I found this: "it is important to close the water intake when you are cranking the engine
to bleed it, because it can pump water into the engine and then you got big problems. so right after you start it, open the water thru-hull."
Question: How would coolant
water make it into the engine in this scenario?
My manual is an "operational manual" and is lacking in detail.