marinebases22
New member
"I am novice at engine work, b
"I am novice at engine work, but am an engineer and have some basic knowlege. I've recently run into an issue with my Marine Power 454. Here's the skinny:
I have a 1997 Carrera 205 Custom Elite. Back in 2001 the previous onwer swapped the original 454 350HP for a performance 454 440HP. I bought the boat from him last year with 70 hours on that engine. It work great last summer...no problems. I did the service (2 oil filters, 3 fuel filters [1 water/fuel seperator, 2 inline], pumped and changed the oil, put in new plugs. When I turned it over, I noticed my starter sounding like crap and smacking the fly wheel, so I sent it out and had it rebuilt. When it came back, the engine fired and sounded great.
I took the boat down to the river this weekend. I ran one day great, no problems. The next day, I was cruising along arrprox. 5000 RPMs and the engine started to gag. I shut it down. When I refired, it was still gagging and I could never get out of the hole. I got Sea-Tow to pull me in, took it to a shop, and I pulled the plugs. They looked at it for a bit, said they ran a compression test and the compression was fine. 4 of the 8 plugs however were beaten to holy hell. The electrodes were bent all over and the ceramic inside the elctrode was cracked. At that point, I paked up and came home. I have an appointment at a local marine shop to take it in next week.
If I have something in there banging around, what acan be done? Will my engine have to be rebuilt if so? Depending on damage, can whatever it is be fixed and the same engine perform the same? If I do have to rebuild, what is the breaking point where I say forget it and I buy a new engine? If I buy a new crate motor, is it worth the extra cash to buy the 502? Any recommendation on where to go for crate motors? I'm at a loss here.
Can you guys give me some advice?"
"I am novice at engine work, but am an engineer and have some basic knowlege. I've recently run into an issue with my Marine Power 454. Here's the skinny:
I have a 1997 Carrera 205 Custom Elite. Back in 2001 the previous onwer swapped the original 454 350HP for a performance 454 440HP. I bought the boat from him last year with 70 hours on that engine. It work great last summer...no problems. I did the service (2 oil filters, 3 fuel filters [1 water/fuel seperator, 2 inline], pumped and changed the oil, put in new plugs. When I turned it over, I noticed my starter sounding like crap and smacking the fly wheel, so I sent it out and had it rebuilt. When it came back, the engine fired and sounded great.
I took the boat down to the river this weekend. I ran one day great, no problems. The next day, I was cruising along arrprox. 5000 RPMs and the engine started to gag. I shut it down. When I refired, it was still gagging and I could never get out of the hole. I got Sea-Tow to pull me in, took it to a shop, and I pulled the plugs. They looked at it for a bit, said they ran a compression test and the compression was fine. 4 of the 8 plugs however were beaten to holy hell. The electrodes were bent all over and the ceramic inside the elctrode was cracked. At that point, I paked up and came home. I have an appointment at a local marine shop to take it in next week.
If I have something in there banging around, what acan be done? Will my engine have to be rebuilt if so? Depending on damage, can whatever it is be fixed and the same engine perform the same? If I do have to rebuild, what is the breaking point where I say forget it and I buy a new engine? If I buy a new crate motor, is it worth the extra cash to buy the 502? Any recommendation on where to go for crate motors? I'm at a loss here.
Can you guys give me some advice?"
