flip050-883
Recruit
- Joined
- Sep 19, 2012
- Messages
- 2
Hello,
I have a 198* Mercruiser 470 3.7L in a 1981 Silverline ski boat.
I bought the boat a little while ago as a non-running boat.Picked up the boat, and trailer for $400. I am now the 3rd owner of it, and the previous owner stated he had it out on the lake last year and it was running great. He said the battery was dead, so I pulled one from another boat I have and tried turning it over.The starter would turn a quarter turn to a halt. Almost like the starter is tired/weak. I got the starter off the motor, took the starter apart and a bunch of junk fell out of it. Put it back together, and got the same result. I was anxious to start working on the motor so I did a compression test. "Yes even with the crappy starter" the 1st cylinder closest to the bow of the boat read 60, the next one over was dead, the next one over read 60, and the last one read 90. When the motor was turning it would come to a halt at the top stroke of the cylinder. I know this isn't an accurate reading because of the weak starter, but I did it anyway. While doing the compression test, I then realized the heat exchanger was unhooked? I read that they get clogged and overheat the motor. But it looks like this guy did a straight shot around the heat exchanger. Checked for spark, and it's got a nice fat blue spark. Do you think this motor is worth rebuilding? And did I overpay for the boat?
I was thinking I could rebuild it myself. I work on dirtbikes and stuff, so I'm familiar with motors and stuff.
Any advice would be extremely helpful!
Thanks,
-Daniel
I have a 198* Mercruiser 470 3.7L in a 1981 Silverline ski boat.
I bought the boat a little while ago as a non-running boat.Picked up the boat, and trailer for $400. I am now the 3rd owner of it, and the previous owner stated he had it out on the lake last year and it was running great. He said the battery was dead, so I pulled one from another boat I have and tried turning it over.The starter would turn a quarter turn to a halt. Almost like the starter is tired/weak. I got the starter off the motor, took the starter apart and a bunch of junk fell out of it. Put it back together, and got the same result. I was anxious to start working on the motor so I did a compression test. "Yes even with the crappy starter" the 1st cylinder closest to the bow of the boat read 60, the next one over was dead, the next one over read 60, and the last one read 90. When the motor was turning it would come to a halt at the top stroke of the cylinder. I know this isn't an accurate reading because of the weak starter, but I did it anyway. While doing the compression test, I then realized the heat exchanger was unhooked? I read that they get clogged and overheat the motor. But it looks like this guy did a straight shot around the heat exchanger. Checked for spark, and it's got a nice fat blue spark. Do you think this motor is worth rebuilding? And did I overpay for the boat?
I was thinking I could rebuild it myself. I work on dirtbikes and stuff, so I'm familiar with motors and stuff.Any advice would be extremely helpful!
Thanks,
-Daniel
