Do not Run Honda 135/150 while flushing?

Sea Wolf · Posted: Wed Jan 11, 2006 1:44 pm Post subject:

David-

OK, here's some more answers to your question: (I posted the question on The Hull Truth web site to open it up to a lot more folks. 2 pages so far.)

http://www.thehulltruth.com/forums/thread-view.asp?tid=86063&start=1

Check it out from time to time, there will be more posts!

Joe.

C-Green · Posted: Wed Jan 11, 2006 7:54 pm Post subject: Do not run 135/150 while flushing

Honda 40 Hp has 3 intake grills. The muffs only cover 2; I cover the third with duct tape when flushing. The third inlet is on the bottom of the antiventilation plate, right above the prop. I learned the hard way and two years later I am still pulling the brass fitting for the telltale to remove bits of the burned and obliterated impellor. The fix was relatively cheap with my labor. I also run the hose wide open with water squirting everywhere and definately out the telltale or shut her down.

Mr. Fisherman · Posted: Wed Jan 11, 2006 9:28 pm Post subject:

I am a proponent of the flush bag.
I have had muffs vibrate off... not good.
Also some hose bibs supply a lot of pressure. This can burden your head gasket or so I am told. It is also loud and the neighbors donl;t like me to do it at 3 in the morning when I return from a Tuna trip, or so I am told.
The flush bag allows the motor to use the same path and preassures to flush teh motor while supplying adaquate back pressure and ti is quieter as it muffles the motor. I occasionally use my hose adapter on my motor, but my prefered meathod by far is to use teh flush bag.
When you are finished with it it rolls up and stores in very little space. You can even run your kicker with it to tune it up.

C-WEED · Posted: Wed Jan 11, 2006 10:19 pm Post subject: Been there, done that....

My yamaha is a 2000 model. I couldn't find anything in the manual that said NOT to run the engine with the water supply on the rinse fitting. I wondered the same thing. What is the dif between the hose fitting and muffs? Why screw with muffs if the fitting is right there?

I needed to run the engine after cleaning the carbs. With the water supply on the engine rinse fitting water runs out the anti-cavitation intake vents. Everything seemed cool.... "Well" the over-temp alarm came on after about five minutes of running the engine with a few revs as I had a sputter-miss at 1800 RPM's I was trying to solve.

The waterpump suffered no appearant damage yet. (I only did it that one time) I think the water going in at the top of the engine is fighting the water pressure from the impeller pump pressure. Coolant flow thru the head is reduced to basically a stand still and an over-temp occurs.

I am sure there are many design differences between brands so follow your manual or just don't risk it. Unless you can afford it.