"I posted a question about a h
"I posted a question about a hydrolocked Mercruiser 350 MAG MPI yesturday. Thanks for all the help in getting it started again. I oiled and blew out the cylinders before I started it up again without any problems.
The mechanic I've been talking to says it still is probably blown head gaskets or warped heads that caused the problem, not water up the exhaust.
I'm not sure how much of what he's telling me that I believe, so I went to AutoZone, bought a tester, checked the cylinder compression, and got the folowing results dry. They didn't seem low to me so I didn't try it with oil in the cylinders. I forgot to open the throttle up all the way as intructions said, does this mean I should start over?
2001 Mercruiser 350 MAG MPI ~90 HRS on it
Back of Engine
#4: 200 lbs #4: 198 lbs
#3: 202 lbs #3: 195 lbs
#2: 205 lbs #2: 200 lbs
#1: 210 lbs #1: 200 lbs
Front of Engine
I don't know what the pressures should be, but I read that low pressure in one or more cylinders could mean bad rings or head gasket. Are these numbers okay? And does this have any relationship at all to the possibility of the gaskets or valves being bad? Should I do any other test?
I haven't put the boat back into the water yet and have been running it on a water hose. If it was bad gaskets or valves shouldn't the water have gotten back into the cyliners again or into the oil?
It happened suddenly when the problem first occured on Friday. I overheated the engine to about 200 degrees and shut off the key while under power. When I tried to crank it would not turn over. As I said before, I found water in two of the cylinders when I got it home.
I don't know enough about engines to be certain if this guy is correct or just trying to make a quick buck on a head job.
I would appreciate any help or direction you guys can provide."
"I posted a question about a hydrolocked Mercruiser 350 MAG MPI yesturday. Thanks for all the help in getting it started again. I oiled and blew out the cylinders before I started it up again without any problems.
The mechanic I've been talking to says it still is probably blown head gaskets or warped heads that caused the problem, not water up the exhaust.
I'm not sure how much of what he's telling me that I believe, so I went to AutoZone, bought a tester, checked the cylinder compression, and got the folowing results dry. They didn't seem low to me so I didn't try it with oil in the cylinders. I forgot to open the throttle up all the way as intructions said, does this mean I should start over?
2001 Mercruiser 350 MAG MPI ~90 HRS on it
Back of Engine
#4: 200 lbs #4: 198 lbs
#3: 202 lbs #3: 195 lbs
#2: 205 lbs #2: 200 lbs
#1: 210 lbs #1: 200 lbs
Front of Engine
I don't know what the pressures should be, but I read that low pressure in one or more cylinders could mean bad rings or head gasket. Are these numbers okay? And does this have any relationship at all to the possibility of the gaskets or valves being bad? Should I do any other test?
I haven't put the boat back into the water yet and have been running it on a water hose. If it was bad gaskets or valves shouldn't the water have gotten back into the cyliners again or into the oil?
It happened suddenly when the problem first occured on Friday. I overheated the engine to about 200 degrees and shut off the key while under power. When I tried to crank it would not turn over. As I said before, I found water in two of the cylinders when I got it home.
I don't know enough about engines to be certain if this guy is correct or just trying to make a quick buck on a head job.
I would appreciate any help or direction you guys can provide."