Outboard motor waterpump pee hole

I know this stinks, the old way of looking for a good stream of water means about nothing with this engine, I have a 96 and don't get me wrong they are a great motor, do yourself a favor and install a water pressure gauge so you can see what is going on. When the motor is in gear, the prop is turning and the boat is moving forward, this backpressure is sucked out thru the center of the prop. This however would not force anything out that may be partially blocking a water jacket internally. You can have a partially blocked powerhead grommet that when full force of the water is exerted on it, it will totally collapse. However since this hole is small, it can get plugged with debris if the motor has been ran in dirty water, or a bug has crawled up inside and died. I would have never beleived if someone told me that this is the design because it sure shoots down using the flow to make sure the pump is good. The flow then splits and goes on each side of the cylinders then out the top into the water jacket of the head.

Most outboard motors have one or two thermostats that are located in the power head of the engine. The tell tale is fairly strong when he runs the engine on the garden hose, but when in the water it sputters or blows steam at idle. When a prop cavitates, the RPMs go up but the boat speed decreases because the prop has lost its grip in the water. You could probably just tie a short length around some non-moving part under the engine cover and leave it there till needed. Many people will tell you that there is no need to have a thermostat in your outboard motor because our winters are not that terribly cold and your engine does not need a thermostat. Many times with age, corrosion will build up inside the water chambers of your engine, and this corrosion will bind the pressure relief valve and not allow it to open at the proper time to cool your engine. The larger opening in the water passageways decreases the water pressure.

Many times with age, corrosion will build up inside the water chambers of your engine, and this corrosion will bind the pressure relief valve and not allow it to open at the proper time to cool your engine. This is why I never replace an impeller kit only. Another side effect of removing the thermostat is that the opening you create by doing this allows too much water to flow through the engine. As engine speed increases and the pressure of the water from the pump also increases, the poppet valve will open and allow some of the cooling water to go around the thermostat for a more efficient cooling system. I like to use a bead blast machine to clean off the surface.