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Catalina/Capri 25/250 Sailor's Forums

General Sailing Forum

Being told I have water in the engine

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putzmeister
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100 Posts

Initially Posted - 10/30/2012 : 09:02:17

So we had our Yamaha 9.9 4-stroke hanging off the back of the C25 all season. The boat sat unused for about 6 weeks. When we went to start it mid September - it would turn over but not start. Confirmed it was getting fuel and had spark.
Took it to a trustworthy mechanic and he said it has water in the cylinders and no compression.
The engine has never been submerged and it ran fine the last time we used it (though the engine cover felt warmer than I thought was normal.)
Anyone ever experience this???

1989 C25
Hull #5822

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piseas
Former Treasurer

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2017 Posts

Response Posted - 10/30/2012 : 12:45:05

Fortunately have not experienced that. What does your mechanic say?
Steve A

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Sloop Smitten
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Response Posted - 10/30/2012 : 13:19:13

Cracked cylinder head maybe or blown head gasket? Cooling water seeping into the cylinder? Usually only present in one cylinder.

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Stinkpotter
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Djibouti
9080 Posts

Response Posted - 10/30/2012 : 16:05:02

A crack could get both cylinders--a head gasket normally just one. Not good news...

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GaryB
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Response Posted - 10/30/2012 : 19:43:39

Something doesn't sound right.

You said it turns over? If the cylinders were full of water they would hydraulic and stop the engine from turning over. It's happened to me twice with the 350 Chevy in my SeaRay. Usually bends or breaks the connecting rods.

If they just have small amounts of water in them then it's probably a warped or cracked head from overheating? and then the head gaskets start leaking.

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putzmeister
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Response Posted - 10/31/2012 : 15:52:06

Mechanic has alluded to a failed head gasket . . . will know more once he begins to disassemble. At least it hasn't seized. Very knowledgeable, trustworthy mechanic. Was able to straighten out one of those difficult to start Honda outboards - when the dealer could not.

Considering the minimal amount of use this motor sees, I am highly disappointed.

News at 11 . . .

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rrick
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Response Posted - 10/31/2012 : 16:53:05

Did it freeze over the last few months? ¿Puputnogo Vetra is in South America, right? Sorry, I needed a practical reason for my tip.

Outboards drain of cooling water rather quickly when left vertical. My manual says if there is a chance of freezing, to leave it vertical with the lower unit in the water.

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putzmeister
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Response Posted - 11/01/2012 : 17:34:48

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by rrick
 Did it freeze over the last few months? ¿Puputnogo Vetra is in South America, right? Sorry, I needed a practical reason for my tip.

Outboards drain of cooling water rather quickly when left vertical. My manual says if there is a chance of freezing, to leave it vertical with the lower unit in the water.
<hr height="1" noshade id="quote"></blockquote id="quote">Thanks for the input Earle. Engine has never experienced freezing temperatures and yep water drains fast.

Poputnogo Vetra = Mongolian term for "may the winds blow in your favor"

Edited by - putzmeister on 11/01/2012 17:37:51

putzmeister
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Response Posted - 11/08/2012 : 21:17:50

So I visited the mechanic and the news isn't pretty. The cam got out of sync with the crank and the valves hit the pistons - bending the valves.

This probably happened as follows. There were a couple of time this summer when I pressed the starter button and the engine maybe turned 5 degree and stopped. I assumed the battery was low so I wrapped the starter rope around the flywheel and pulled. It felt like the engine was on a compression stroke - it wouldn't budge. I grabbed the flywheel to see if I could rotate it. When it seemed to get past the compression stroke and the engine would turn using the electric start - then it would start.

Apparently the last time I did this the notched belt that rotates the cam - skipped a notch. We understand why the valves are bent, but we don't yet understand why the engine wouldn't turn over with the electric starter.

Anyone encounter this with their Yamaha 9.9 4-stroke?

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