On Feb 10, 1:49*pm, John H wrote:
On Wed, 10 Feb 2010 10:27:33 -0800, "JT"





wrote:

"Steve B" wrote in message
...
Every once in a while, I want to run my 40 Merc OB to test it and look for
leaks, adjust carbs, etc, without taking it to the lake and doing it
dockside or bouncing around out there, and perhaps getting towed in.

I have a 55 gallon plastic barrel with the top out. *I can fill it to the
water mark on the engine, the same as if it were in the lake. *Is this an
advisable way to work on an engine. *I have even shifted it into gears,
just not hit the gas. *Duh .......

Is it the same as doing it at the lake?

Steve

Yes, I have ran many motors this way, it's not an issue.

You could possibly also run it with the following:
http://www.splashvision.com/Video/17...outboard-motor....

JT

For some reason, I couldn't get the muffs to work on my Yamaha. They
were the most expensive sold by West Marine, and they seemed to fit
fairly well, but even after about ten seconds of running, no water
came out the telltale. That's why I got out the tub.
--

John H- Hide quoted text -

- Show quoted text -

That's a problem I have heard from other Yamaha owners, they just
don't cool right on muffs.

To tune a 2-stroke in a tub you need to put the prop on AND put the
motor in gear. You need to duplicate the exhaust back pressure and the
oad that the motor will see in the water as 2-strokes are very
sensitive to both at idle.