Steam

[vilord]

So I think I'm getting excessive steam...

I thought it was from the cavitation problem I had before, but that's fixed now, and there's still lots of steam.

After running around for a while then idling for a bit, there is a little steam coming out. If I run WOT, it seems just fine.

If I run WOT for about 5 minutes then throttle back to around 3K or 4K, it bellows out steam from the exhaust...
Open the engine cover put my hand on the engine, feels warm to the touch.
I haven't put my hand on the exhaust parts yet, but last month i did and they all seemed fine.

Is this the water regulator, or is one of the water jackets/passageways blocked?

 

[robin savell lloyd]

It sounds like you are on the right track I would allso make sure that none of the exhaust fitings are restricted. Could be sand in fiting or in regulator. I would not think in engine as it would burn your hand and you should have a alarm go off. I can allways be wrong so good luck. :cheers:

 

[factory81]

Welcome to my old problem haha.

 

[vilord]

Well I'm just hoping your new problem doesn't become my new problem... I'd like to avoid a cracked crankshaft

 

[Nate Surveyor]

Jes leave it alone... it wants to evolve into a steam engine!



Or else it has a leak in the exhaust, whereby TOO MUCH water is flowing into the exhaust, at some place, and too little in another. Thus it makes too much heat, and creates steam. Maybe a leak that allows water to puddle, and when it gets hot, it steams it out. Whatever, steam is an indication of heat, probably too much of it.

I suggest a COMPLETE flushing of the cooling system, and remove some of the fittings, in the process, to be sure nothing is clogging it.

And if that does not fix it, maybe another exhaust pipe.

For sure, it should not do that, and possibly it will hurt the motor. I don't really think anybody knows for SURE.

I don't know for sure. But, I would not ignore it.

Nate

 

[seadoosnipe]

Steam?

:agree: with Nate, except on replacing the tuned exhaust header. That puppy is $500 smacks!............

Your chances are, it's the water regulator sticking. When at idle, the water pressure created at the pump isn't strong enough to over come the spring tension in the valve, therefore, the water is being bypassed from the water box to the lower end of the tuned pipe, adding water directly to the exhaust.

When you speed up, the pressure on the nozzle pushes up on the spring, closing the bypass to the tuned pipe and opening the water to the exhaust at the water box. There is a calibrated fitting there that may have a piece of sand grit stuck in it. It's actually the little brass fitting under the black plastic spring loaded, diaphragm valve. So, check it and if it's clear, check your bellows. Make sure you don't see water in there.

Then, like Nate said, look for leaks into the exhaust system. The best way to do this is when it's on the trailer. Start it up and turn the hose on. If there is a leak, you should be able to tell by the amount of water dumping from the exhaust..................:cheers:

 

[vilord]

How much water *should* be dumping from the exhaust?

Sure would be easier if I could just put my boat next to one of yours to compare

I'm ordering a new regulator either way, mine flew apart a couple months ago when I was pulling the muffler to replace the transom/exh gasket, and maybe something didn't go back together right.