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Forum: Engines and Propulsion Systems

13-08-2015, 05:13

Replies: 11

Flushing raw water cooled engine

Views: 7,688

Posted By Wotname

Re: Flushing raw water cooled engine

Actually I should have said "most" rather than "some" and if one is only considering new Yanmar engines, it should be "almost all" IMO.

AFAIK, they only sell one raw water cooled engine these days...

Forum: Engines and Propulsion Systems

11-08-2015, 03:25

Replies: 11

Flushing raw water cooled engine

Views: 7,688

Posted By Wotname

Re: Flushing raw water cooled engine

There you go, I fixed it for you :smile:

Yanmar engines with the letter F in the model designator are fresh water cooled.

Forum: Engines and Propulsion Systems

10-08-2015, 13:22

Replies: 11

Flushing raw water cooled engine

Views: 7,688

Posted By Wotname

Re: Flushing raw water cooled engine

Russ makes a good point about fresh water cooled engine ( heat exchanger). I would be very careful about using any sort of acid including vingear without more research.

I have presumed it was a...

Forum: Engines and Propulsion Systems

10-08-2015, 05:02

Replies: 11

Flushing raw water cooled engine

Views: 7,688

Posted By Wotname

Re: Flushing raw water cooled engine

The vingear worked well for me. It is a mild acid so needs a fair amonut of time to do its job. It was very very brown at the end.

I would push it though as far as possible but not INTO the...

Forum: Engines and Propulsion Systems

08-08-2015, 16:12

Replies: 11

Flushing raw water cooled engine

Views: 7,688

Posted By Wotname

Re: Flushing raw water cooled engine

There is a semi recent thread about flushing raw water cooled engines.

I have just flushed my Yanmar 2GM20 and FWIW, here is some details.

I used 8 litres say 2 gallons of cheap white vingear...

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