Hydrolocked my motor

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12-20-2011 | 03:51 PM

#31

Eliminator28

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Joined: Mar 2010

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From: So Cal

Quote:

Originally Posted by Philm

My hose pushes at least 40 lbs, but wont push water past my raw water pump. It also does not even come close to keeping up with the raw water pump as far as flow. It regularly sucks the garden hose flat at anything over an idle.

Quote:

Originally Posted by apollard

I agree with Philm - unless you bypass the raw water pump, the engine never sees 80 psi. Mine runs 70 psi, and I get no flow until cranked.

This is what I'm sayin...WTF

12-20-2011 | 04:13 PM

#32

blue thunder

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From: IBX

Quote:

Originally Posted by Eliminator28

After pressure testing the Manifolds, and running water through the risers, and finding no leaks, I have to conclude that this was self induced... Too much hose pressure I guess.. God I've done this a hundred times.

I can't imagine that water can go past the pump.. at a higher volume than the pump is pumping. Does that even make sense?

The idea of using the 5 gal bucket sound like the safe bet. Good one, and soon to be my new process

The best way is to take the water intake hose off the transom and shove a garden hose down it. No pressure ever and it sucks as much air as it wants. Good luck with the teardown.

12-20-2011 | 05:24 PM

#33

199025sxtWarlock

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Joined: Oct 2011

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From: Monmouth NJ

Intake manifold , and water went down, bent valve, or broke piston..

12-20-2011 | 06:15 PM

#34

tcelano

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Joined: Oct 2004

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From: Portland, OR

I run sea strainers, and my flush fittings come in just after the strainer outlets. When I turn the hose on, I leave the hull valves open, and it backflushes my strainers. The hose keeps the strainer pot full, and the engine just sucks out of it like normal, so once it starts, water stops flowing out the pickup. No chance of pressurizing the system like that.

My old boat wasn't set up quite like that, so I always made a mad dive for the hose valve as soon as I killed the motor, because the hoses would start coming under pressure.

12-20-2011 | 07:46 PM

#35

88bullet

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Joined: Mar 2008

Posts: 3,306

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From: lockport ny

rod is probably shaped like an S and your piston is hitting the counterbalance of the crank. time to pull it. sorry to hear about your bad luck..

12-26-2011 | 03:44 PM

#36

Pismo10

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Joined: Jan 2002

Posts: 2,053

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From: Further South East of Dome Island

If you are putting water to the muffs, regardless of pressure, the water cant get past a non-spinning impeller in the raw wter pump so not to worry. Muffs also leak like crazy under very little pressure. There would be no way to get 80bs onto th head gaskets usng muffs on the drive.

12-26-2011 | 04:46 PM

#37

mike tkach

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Joined: Oct 2007

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From: yorkville,il

eliminator28,have you pulled the engine yet,im curious as to what you found.

12-31-2011 | 11:38 PM

#38

40gt

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Joined: Jun 2009

Posts: 213

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From: Perth, WA, Australia

Quote:

Originally Posted by Knot 4 Me

Merc had a bulliten out awhile back on running their motors on a garden hose. They recommended @ 1,200 RPM and not to have a ton of water pressure coming out of the hose. When you backed off the lower RPM and high water pressure could have reverted water. Are you sure it didn't just drop a couple of cylinders and die?

Is this the one, June 1999, or is there a newer revision?

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