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F*O*A*D

On 3/14/14, 3:34 PM, wrote:
On Fri, 14 Mar 2014 12:02:26 -0400, F*O*A*D wrote:

On 3/14/14, 11:37 AM, wrote:

You are probably better off to turn on the water,
pressurize the system, then turn it off, let it drain down and repeat
several times.

The other factor is the hose to the flush port is 5MM ID (less than a
quarter inch) so you are not really moving that much water anyway.

If you really want to flush the block, you need to remove the
thermostat, drop the foot and back flush through the thermostat hole
... but you are not going to do that very often.

These are wonderful, time-consuming suggestions for those who are
retired and have little of importance to do, sort of like painting a
ceiling and watching the paint dry.

I especially like the second suggestion.

The first one is the only way you are actually going to get fresh
water up into the top of the block more than once.
If you want, I can scan the water flow diagram from the shop manual.
The thermostat stops water before it exits the block (that is how it
works).
If the thermostat is closed, you are not going to get circulation
through those passages.

The second suggestion is a maintenance flush

You might want to do that on a 100 hour if that is once a year. I
usually do it at around 300-400 which is once a year for me.

(any time I have the foot off)

Gee, I'll keep all this in mind in case I buy another Yamaha outboard.