Hey Guys. I'm hoping I can get some help with my merc. I'm brand new to this, so if I'm in the wrong spot please just let me know.
A couple months ago I picked up a boat/motor/trailer combo for quite cheap. The motor wouldn't start, and I'm no boat mechanic, but I've always wanted to learn how to work on an outboard so I figure I'd give it a try and see what I can learn.
I came away with a 1978 Mercury 7.5 hp motor. Here's where I'm at:
To get it to start, I cleaned the carb, replaced spark plugs, re did some wiring that corroded through. After some ether, fiddling with the choke, and a few hundred pulls, it comes to life.
Next problem to come up, the water pump isn't working. I pulled it apart, the impeller was in 100 pieces. Replaced the impeller, oil seal and o-ring, and did a deep cleaning of the line. I pulled a lot of pieces of that impeller out, and when I opened the flush a ton of sand came out. When it was all put back together, I gave a blast of compressed air through the intake, outlet, and flush and had air running out of the other end, so it was clear and good.
When I started it back up, still no water coming out, however now there was a solid stream of exhaust coming out of the outlet. Fiddled with it, tried to stick the hose on the screen on the bottom and onto the flush as well to try to prime it, that didn't work. I can get water pouring out of the flush when it is running, but it just won't come out of the outlet of that water line.
Can anyone help me with what to look at next?? I would really appreciate the help. It's taken a couple months, a ton of learning and frustration to get to this point and I really wanna get that bad boy in the water. Thanks.
A couple months ago I picked up a boat/motor/trailer combo for quite cheap. The motor wouldn't start, and I'm no boat mechanic, but I've always wanted to learn how to work on an outboard so I figure I'd give it a try and see what I can learn.
I came away with a 1978 Mercury 7.5 hp motor. Here's where I'm at:
To get it to start, I cleaned the carb, replaced spark plugs, re did some wiring that corroded through. After some ether, fiddling with the choke, and a few hundred pulls, it comes to life.
Next problem to come up, the water pump isn't working. I pulled it apart, the impeller was in 100 pieces. Replaced the impeller, oil seal and o-ring, and did a deep cleaning of the line. I pulled a lot of pieces of that impeller out, and when I opened the flush a ton of sand came out. When it was all put back together, I gave a blast of compressed air through the intake, outlet, and flush and had air running out of the other end, so it was clear and good.
When I started it back up, still no water coming out, however now there was a solid stream of exhaust coming out of the outlet. Fiddled with it, tried to stick the hose on the screen on the bottom and onto the flush as well to try to prime it, that didn't work. I can get water pouring out of the flush when it is running, but it just won't come out of the outlet of that water line.
Can anyone help me with what to look at next?? I would really appreciate the help. It's taken a couple months, a ton of learning and frustration to get to this point and I really wanna get that bad boy in the water. Thanks.