Can water get into the heads.

When I did this test on the battery and what not I ran water into the cooling system by way of hose which would substitute as the lake...
When I shut the engine off I still had the water on and it pretty much locked the engine up for the next time I tried to start it, what I had to do was take the spark plugs out and turn it over to get the water out...
Did this hurt my engine, is it normal, I dont know because I have never had to deal with exhaust manifolds like this...??? Please help... Tom...

now that I think about it, it was mainly only comeing out of the one piston... 1 or 2, From the sound of this engine and the way it runs I would not think that there is something seriously wrong, but I really dont know... It runs good...

Man, I am really not looking forward to pulling those off, I am going to have to though beacuse I really like this boat and I dont want to have to rebuild the engine right now... Any suggestions????

Tom, Pressure test - I did know someone did use two of these plumbers test plugs to block off the water ports inside his risers. Don't know if it would work on the H/M's. Depends on the shape of the ports. If they are just holes, then it would work. If they are protruding type venturies then it may not. It would save you from removing the risers and making block off plates. Looking inside may be a problem! If you have a small head maybe you can see up inside after removing the exhaust hose!!!

Any resolution on this yet Tom? As for unbolting manifolds, these lightwgt HM pcs are some of the easiest. You should be able to unbolt them from the engine w/o disconnecting from exh hose. Swivel manifold away from engine at front and hook the water hose to the water inlet on the manifold and run water thru it. While of course it's best to really pressure test it, your water hose will simulate the engine pump's pressure and will often reveal a leak in the manifold. As Pete noted, you will have to separate the manifold from the riser with a block-off plate to pressure test the manifold. I made mine from thin sheet metal. If there's a leak in the riser, I would think the water wouldn't make it all the way back uphill to the 1 or 2 cyl bypassing 4 and 3. Let us know what you find out.

With age, #1 and #5 would be the first exhaust ports to burn through the back side into the water vein.

Reid, The protruding water ports I'm thinking of, (don't remember who's riser) I really don't know if the design was intended to create any venturi effect or was just a added measure it keep the water going in the proper direction. Now that I think about it, I would think the latter! Besides making the exhaust passages bigger and reducing sharp bends, I don't think the manifold were very high tech. I asked about protruding water ports because I was curious if the plumbers test plug trick would work on the H/M's.

You got some great advice and your situation is much different than mine.
The first summer I had my nautique the starter went. When I ordered a new one I gave the guy the engine number and told him it was the opposite turning engine on the 81'. He sent me the wrong starter. Well I proceeded to suck water through the pipes and filled all cylinders. Petrified I called Correct Craft and they assured me it was no big deal. Just do several oil changes to get all the water out of the system, get the correct starter and I should not see any other problems. I did 3 or 4 oil changes before we got it all out. My dad is an engineer at a Nuke plant and took in an oil sample for spectro-analysis to see what water was left. None. The boat has served us well for the past 6 years and is running strong.