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Volvo Penta 57 GS engine wonbt turn

M

MC

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"Motor started fine one mornin

"Motor started fine one morning at the house (with flush attached). Got to the lake, launched, and the starter burned up trying to crank the engine. Next week, replaced starter, and now engine won't turn at all! What could have possibly happened between the house and the lake?
What should I look for? I can't get a socket to fit on the crank to turn it by hand. Help?!"
 
"Remove the spark plugs from y

"Remove the spark plugs from your engine. Check to see if any water ours out of the cylinder head. You may have pulled water into the engine and created hydrostatic lock. Inspect the plugs, what do they look like?

With all of the plugs removed try to crank over the engine. Good luck."
 
"I hear you. That was my next

"I hear you. That was my next (and only) step to try and troubleshoot this. I cannot understand, however, how water could have been pulled into the engine, unless through the intake, which is just not possible! Otherwise, I might have a blown head gasket. Wouldn't that lead to signs of water in the oil? I checked, and the oil looks like new (recent change). Any possibility the engine and sterndrive are locked up? THANKS!!"
 
"MC,

Water can enter the en

"MC,

Water can enter the engine block through the exhaust manifolds and/or risers. Pressure testing manifolds is fairly easy, risers are more difficult. Usually a visual inspection of the risers can determine if they are past their prime."
 
"Hmmm...
So if there is a lea

"Hmmm...
So if there is a leak in the water jackets of the manifold/riser, this can get back into the engine!
Well... this boat is 10 yrs. old, but has less than 200 hrs. on it. I recently pulled the hoses, to pickup all the impeller parts that got scattered from a disentegrating impeller, and what i could see into the manifold looked very rusty...
Might take me a few days to get to this. We are buttoning up for storm Eduard which will be in Houston by tomorrow. thanks for your help!"
 
"10 years is a lot for manifol

"10 years is a lot for manifolds/risers running in salt water, never mind the 200 hours."
 
"You may also have stuck injec

"You may also have stuck injector and filled your cylinders with fuel causing a hydraulic lock, check your oil level if it has done the above it may enter the block causing oil level to rise. Sounds like it just happened to me... Pull plugs and check for either water as prescribed or fuel, be careful if fuel as those plug wires down there in the bilge will certainly ignite fuel vapors if you crank the engine."
 
"Thanks, Dana.
My engine has

"Thanks, Dana.
My engine has a good old Holley carb.
The oil level is ok. Oil looks good. I will pull the distributor cap before cranking!!
This forum is the best! I will certainly post my findings, although it will probably not be until Saturday...."
 
"UPDATE!!!
Mike wins the priz

"UPDATE!!!
Mike wins the prize!
Upon pulling the plugs, I found water in (2)two cylinders, different sides of engine. I have removed ex. manifolds, and will replace. The motor spins fine. What should I do meanwhile, squirt some oil into the cylinders, and spin the engine to keep the walls from rusting? I do not know how long this condition has existed. Should I expect any long term damage??
THIS FORUM HAS SAVED ME $$$$$ !!!
Thanks again to Mike and all who responded!
M."
 
"I had something very similar

"I had something very similar happen to me on my 1998 Four Winns with a 5.7GS Volvo. It happened twice, both after a hard driving rain (the boat was in my driveway with the cover on). When I tried to start it after the rain, it was hydrolocked as mentioned in your scenario. There was water on top of the air intake ... I now cover the two round engine vents when I cover the boat. So far, no more water on the engine after a rain. But, I continue to check it because I know it could be something else."
 
"update: I was about to instal

"update: I was about to install new ex. manifolds, plugs, when I gave the motor another spin for fun. More water coming out of cylinders! This after sitting a couple of weeks with hoses off. Where is this coming from? Did a compression test. Most cyl. are 210-215psi. One is at 185psi. Is this low enough to cause concern? Again, motor ran great before the hydrolock (see threads). Should I bolt on the new cast iron and run with it, or tear down more of the engine first?? Thanks in advance..."
 
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