Merc 80; small amts of water in #2 cyl
:( Need help!! I have a 80 HP Merc, 3 cylinder engine. The number 2 cylinder was getting water into it. I tore the engine completely down, could find no cracks in the cylinder area. I replaced all of the gaskets during the rebuild. Engine ran perfectly for about 5 minutes then started to "miss". Pulled the #2 plug and found a slight amount of water. Could it be the little check valve on the intake manifold. I have never seen these little ball valves in the older engines. Can you run the engine without these little ball valves? Any way, my real question is where could this water be coming from? Does the 80 Merc have any history on this? This engine has blind cylinders and the best I could do when I had it apart is to look for cracks with a flash light but could find none. Any help or ideas, especially from some one with similar experience would be appreciated. Capnzee:(
Reverse the Battery and Run...
Just reverse the battery, and run her in reverse, that should pump the water out...
ADD: Is this the motor with the "BIG FOOT" or "FAT FOOT"??? I actually may have some props for this thing....(This year, see Sport C for sale)... http://www.boatracingfacts.com/forum...ght=sport+sale
I had another idea ofn the water problem, on run her at Needles when the river is low...
Last ADD: When you having lunch, today...I think I'll come down and let you buy, again! (Did you see the Evinrude 15 A I bough on E-Bay???)
only 3 things to check....................
as with all the Mercs with no cylinder heads, there are only 3 things to check, that could cause a water leak:
1) P/H EXHAUST ADAPTOR PLATE (this is what the powerhead bolts to on the midscetion). Make sure the gaskets above and below it are in good shape, as a blown gasket below the plate will cause water to leak from the water inlet passage into the exhaust cavity.
2) INNER EXHAUST BAFFLE PLATE (this is the plate behind the exhuast cover) . It was very likely to be the culprit on the earlier style 4/6 cylinder Mercs, but has been improved since that design.
3) BEHIND THE WATER JACKET COVER. The only problem here would be a crack around one of the cylinders, but probably not very likely...............
you can buy magnaflux in a spray can to check for cracks, but with the amount of water you seem to be getting into the cylinders, it should be obvious by the naked eye where it is leaking..............