scubapro820 said:
Yeah I do want quite I think I'm gonna make a inline ball valve and fitting to run the boat out of the water for tuning so I can use. The garden hose for cooling
Not sure I follow you on that. Do you mean a hose connector so you can hook the boat to the garden hose for flushing/running out of the water? If so, all you need to do for that is have the 3/4" internally threaded fitting like Tigershark uses for the water outlet on the side of the ski, then a short adapter hose that goes from female garden hose threads on one end, to male 3/4" threads to screw into that outlet. (I'm thinking they're 3/4"...unless it's some fruity metric BS) Then get a shut-off valve for the end of the water hose.
This method of flushing (running water into the outlet) gives a reverse flow, which is actually quite useful for dislodging any type of sand or debris in the cooling system. Doing a reverse flow flush, the water will back-flow, through the fitting on your jet pump, and some of it will also flow through your waterbox....again, useful for flushing out any debris.
I had a ball valve inline on my Tigershark, it was between the jet pump and the engine. This allowed me to hook the garden hose to the engine of my jetboat and flush it out
while it was in the salt water...as the valve stops the flow of water from the jet pump. Then, after flushing, shut the engine down, and open the ball valve back up.
BUT.....there is too much risk of forgetting to open the ball valve after flushing, then, the next time you crank up, you run hot. I did it a couple of times with the TS engine.
So, when I put the High Output in there, I didn't bother with the ball valve.....just an inline water strainer to catch trash, the same one I used on the TS engine.
That's one thing I WOULD recommend
very strongly. (Strainer) That, and an outboard water pressure gauge, so you can instantly see if there's an issue with the cooling system, like a clog from trash.
But as far as trying to shut off the salt water flow from my jet pump, I figured out that if you only operate the engine at low RPM while flushing it in the water, the pump doesn't generate enough PSI to over-ride the garden hose pressure, so, no salt water goes into the engine. I tested it by checking a water sample flowing out of the discharge fitting from the engine, checked it with a salinity meter, definitely fresh water.
And since putting the HO engine in the boat last year, I don't leave it in the salt water as much, at least not more than a few days at a time. With the TS, I would leave it in for a few weeks at a time. But in both cases, I make sure that I have good, working zinc anodes on my boat, as well as good bottom paint. Very important in saltwater.
