Hi, I'm new here and new to owning a boat. I bought this boat only a week ago.
This boat has a 1991 Merc 3.0L that was running great when I bought it last week. First trip out on water, 45 minutes running, then loss of some power and rough running. Brought home and discovered water in cyls. 3 & 4. Pulled head and had it resurfaced. Took .008 tho get it flat again. Paperwork that came with the boat shows head being rebuilt just 15 months ago. When disassembling engine, I found that the last two bolts through intake/exhaust manifold were missing. This might explain where the water came from.
I put it all back together today using a new gasket set and following proper procedures. Compression is low, 65 psi, on all 4 cyls. I think maybe pressure tester is bad. Crank the engine and cyl. 3 is not firing. Readjusted the valves and tried it again. Same thing but running a little rougher. Pulled all plugs and spun the engine over. Water shot out of both cyls. 3 & 4. Needless to say, I was very upset. I'm back to square one.
Any thought on what may be causing water to get in the cyls? I am fairly competent when it comes to getting an engine to run, but I'm no expert on marine engines. Any and all help is appreciated.
This boat has a 1991 Merc 3.0L that was running great when I bought it last week. First trip out on water, 45 minutes running, then loss of some power and rough running. Brought home and discovered water in cyls. 3 & 4. Pulled head and had it resurfaced. Took .008 tho get it flat again. Paperwork that came with the boat shows head being rebuilt just 15 months ago. When disassembling engine, I found that the last two bolts through intake/exhaust manifold were missing. This might explain where the water came from.
I put it all back together today using a new gasket set and following proper procedures. Compression is low, 65 psi, on all 4 cyls. I think maybe pressure tester is bad. Crank the engine and cyl. 3 is not firing. Readjusted the valves and tried it again. Same thing but running a little rougher. Pulled all plugs and spun the engine over. Water shot out of both cyls. 3 & 4. Needless to say, I was very upset. I'm back to square one.
Any thought on what may be causing water to get in the cyls? I am fairly competent when it comes to getting an engine to run, but I'm no expert on marine engines. Any and all help is appreciated.