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Old 28 July 2009, 10:27   #11
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,621
Originally Posted by BrAinZ View Post
You say that you don't need to use the muffs... but I thought that if you ONLY flush using the attachment half way up the engine, then it doesn't flush the whole engine/gearbox completely.

I was told it's always best to fully flush things through by using the muffs.

If you've ever connected the hose to the connector and turned it on, you've seen water coming out all over the place on the LU.

I feel perfectly comfortable using the hose attachment. Apparently the designers do, as well, as they keep putting them on the motors.

Not sure how the "don't use the connector" thing got started, but I will say it's a pretty pervasive opinion.


jyasaki is offline   Reply With Quote
Old 28 July 2009, 15:54   #12
Country: UK - England
Boat name: SOLD
Length: under 3m
Join Date: Jun 2004
Posts: 794
We use the hose connecter as the muffs just cant get the water to the telltale
no other way

Roy Smith is offline   Reply With Quote
Old 29 July 2009, 01:48   #13
Country: UK - England
Town: Cowes
Boat name: WightStuff
Make: Ribeye
Length: 6m +
Engine: Yamaha 150hp
MMSI: 235072807
Join Date: May 2009
Posts: 319
Interesting comments. So far we have used the muffs and the engine seems perfectly happy running with temps fine and water coming from the TT.

I would have from a pure logic point of view, it must do a better job with the water running round a moving engine than stationary?
BrAinZ is offline   Reply With Quote
Old 29 July 2009, 03:02   #14
Country: UK - England
Town: Near Godalming
Boat name: AJA
Make: Ribeye
Length: 6m +
Engine: Yamaha F150AETX
Join Date: May 2009
Posts: 558
Given that the hose connector has been put there by the designers, I would be more tempted to use the recommended flushing system/routine than any other.
neilda is offline   Reply With Quote
Old 29 July 2009, 04:05   #15
Country: UK - England
Make: Ribcraft 6.5
Length: 6m +
Engine: Suzuki DF175TG
Join Date: Apr 2002
Posts: 929
Both flushing methods are in the manual.

I suspect that flushing with muffs is more thorough. Looking at the Cooling diagram in the service manual its going to be hard for the hose attachment to flush everything, especially if you wait too long after switching off the engine and the thermostat closes.

DJL is offline   Reply With Quote

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