Ok.....
I’ve owned this 2000 maxum 19' cuddy with a 5L merc I/O for 4 years now and its been a great boat and hasn’t given me a lot of grief . Replaced the wear and tear, winterized properly, and between me and the previous owner, it hasn’t seen a lot of the salt chuck. It's mainly been a fresh water boat.
A few weeks ago I took it in the ocean for the day and when we were heading back to the launch it was starting to get dark. I must of gone through a kelp bed and of course the one light that doesn’t work on my dash cluster is the temp and my alarm didn't go off when the boat started to over heat.
Not going to go into great detail, but I finally smelled my burning motor and shut it off right away and let it cool down. I started it up after the it cooled and it fired up no problem. I looked at the damage but nothing to visible without tools and a tear down.
Next day I got it back on the trailer and started to tear it apart. I knew right away that one of my remote cables wasn’t smoothly working and found that I melted the lower cable from the top of the motor down to the leg and melted both the rubber one way flappers in the manifold.
I replaced the impeller, removed all the rubber/metal bits in the leg and manifolds from the flappers and replaced them, replaced the lower cable.
I put the boat in the lake the next week for a test run and everything seemed ok till I went for a pull on my slalom ski. Getting out of the hole was a lot harder and slower then most times, so did a compression test and made sure all the plugs were firing.
So hears the break down and where I'm at at the moment and what I should do next,
5 out of the 8 cylinders read 130ish. The two middle cylinder on the starboard side (don't know the firing numbers) have a water leak but the oil still looks good and not milky at all. One of those two is 20 psi down but the other one still reads 130.
On the port side, the aft cylinder is really low, 50psi down and the one in front of it, is around 10 psi down from 130psi
The next thing I'm going to do is a air leak test and manifold tear down. The manifolds are stock and haven’t been replaced. I'm hoping I just have a manifold/riser leak and maybe I might of bent a valve(s) or broken spring(s) and not messed up the cylinder/piston/crank
When I talked to my local Merc dealer they said that it's rare to blow a head gasket when over heat. Its always manifold/ riser leaks and the valve train that gets damaged first when you over heat in older Merc motors.
I'm not really wanting to put a load of money into this boat as I was going to sell it next season and get a tournament/competition boat as we spend more time doing water sports and lake cruising, but I'll sure miss having a cuddy.
I guess what I'm looking for on here is not a quick fix but worst and best case scenarios. Not including time but what is this little oops going to cost me in parts and machine time.
Any input and info would be greatly appreciated!
I’ve owned this 2000 maxum 19' cuddy with a 5L merc I/O for 4 years now and its been a great boat and hasn’t given me a lot of grief . Replaced the wear and tear, winterized properly, and between me and the previous owner, it hasn’t seen a lot of the salt chuck. It's mainly been a fresh water boat.
A few weeks ago I took it in the ocean for the day and when we were heading back to the launch it was starting to get dark. I must of gone through a kelp bed and of course the one light that doesn’t work on my dash cluster is the temp and my alarm didn't go off when the boat started to over heat.
Not going to go into great detail, but I finally smelled my burning motor and shut it off right away and let it cool down. I started it up after the it cooled and it fired up no problem. I looked at the damage but nothing to visible without tools and a tear down.
Next day I got it back on the trailer and started to tear it apart. I knew right away that one of my remote cables wasn’t smoothly working and found that I melted the lower cable from the top of the motor down to the leg and melted both the rubber one way flappers in the manifold.
I replaced the impeller, removed all the rubber/metal bits in the leg and manifolds from the flappers and replaced them, replaced the lower cable.
I put the boat in the lake the next week for a test run and everything seemed ok till I went for a pull on my slalom ski. Getting out of the hole was a lot harder and slower then most times, so did a compression test and made sure all the plugs were firing.
So hears the break down and where I'm at at the moment and what I should do next,
5 out of the 8 cylinders read 130ish. The two middle cylinder on the starboard side (don't know the firing numbers) have a water leak but the oil still looks good and not milky at all. One of those two is 20 psi down but the other one still reads 130.
On the port side, the aft cylinder is really low, 50psi down and the one in front of it, is around 10 psi down from 130psi
The next thing I'm going to do is a air leak test and manifold tear down. The manifolds are stock and haven’t been replaced. I'm hoping I just have a manifold/riser leak and maybe I might of bent a valve(s) or broken spring(s) and not messed up the cylinder/piston/crank
When I talked to my local Merc dealer they said that it's rare to blow a head gasket when over heat. Its always manifold/ riser leaks and the valve train that gets damaged first when you over heat in older Merc motors.
I'm not really wanting to put a load of money into this boat as I was going to sell it next season and get a tournament/competition boat as we spend more time doing water sports and lake cruising, but I'll sure miss having a cuddy.
I guess what I'm looking for on here is not a quick fix but worst and best case scenarios. Not including time but what is this little oops going to cost me in parts and machine time.
Any input and info would be greatly appreciated!
