hoowahfun
Petty Officer 2nd Class
- Joined
- Sep 1, 2016
- Messages
- 186
Mercruiser 3.0 and Alpha One Gen 1 Outdrive, motor S/N B515218.
This motor ran with the outdrive removed. Here's what I've done since it last ran:
1) Replaced gimbal bearing and aligned with engine.
2) Replaced all bellows.
3) Replaced impeller and all gaskets, o-rings, etc.
4) Changed the oil in the outdrive.
5) Shift cable is the same as it looked okay and shifted okay before removing. Shift cable re-installed and all adjustments made and seems to work as it should.
6) Trim sending units are currently not installed yet and are just hanging up and out of the way.
7) Trailered it to my local gas station and filled the tank with premium gas. I've since discovered that probably wasn't necessary and could have used regular octane, but I wanted to be safe since I didn't think of it till I was on the way.
After all this, the motor would turn over and ran very rough and would stall unless held at WOT. It never did run right like it did before I put the outdrive back on and filled it up. After about 10 minutes of this it stalled and died and I haven't been able to restart it since then. When I crank it now, it turns over, but won't catch and I start getting some loud puffs out of the carb.
Some other relevant info: The fuel pump, starter, plugs, and plug wires are all new. Oil and oil filter are fresh and new. The motor has run well with all these new items on (when outdrive was off). Has the Pertronix kit on the distributor.
Here's what I've tried so far:
1) Checke the timing probably (visually with harmonic balancer and distributor rotor) 3-4 times.
2) Checked firing order and plug wires 3-4 times.
3) Adjusted throttle cable, idle speed screw, and idle mixture needle per the service manual.
4) Confirmed choke adjustment per manual.
5) Cleaned carb fuel screen. Had a small amount of debris in it, which I cleared out.
6) Checked gas tank vent line. No dips and is free and clear.
7) Checked fuel filter and it was clear and didn't notice anything odd about the fuel in the filter bowl.
8) The carb squirts gas when the throttle is pumped.
9) The plugs are a little wet and smell of gas when I checked.
My battery started to die this evening so I will need to charge that before further testing. Next on my list is to confirm I'm getting spark to each cylinder with my timing light.
Anyone have any other thoughts? Sorry for the large dump of data here, just trying to throw everything out there to give an overall view of what's going on. Thanks!
This motor ran with the outdrive removed. Here's what I've done since it last ran:
1) Replaced gimbal bearing and aligned with engine.
2) Replaced all bellows.
3) Replaced impeller and all gaskets, o-rings, etc.
4) Changed the oil in the outdrive.
5) Shift cable is the same as it looked okay and shifted okay before removing. Shift cable re-installed and all adjustments made and seems to work as it should.
6) Trim sending units are currently not installed yet and are just hanging up and out of the way.
7) Trailered it to my local gas station and filled the tank with premium gas. I've since discovered that probably wasn't necessary and could have used regular octane, but I wanted to be safe since I didn't think of it till I was on the way.
After all this, the motor would turn over and ran very rough and would stall unless held at WOT. It never did run right like it did before I put the outdrive back on and filled it up. After about 10 minutes of this it stalled and died and I haven't been able to restart it since then. When I crank it now, it turns over, but won't catch and I start getting some loud puffs out of the carb.
Some other relevant info: The fuel pump, starter, plugs, and plug wires are all new. Oil and oil filter are fresh and new. The motor has run well with all these new items on (when outdrive was off). Has the Pertronix kit on the distributor.
Here's what I've tried so far:
1) Checke the timing probably (visually with harmonic balancer and distributor rotor) 3-4 times.
2) Checked firing order and plug wires 3-4 times.
3) Adjusted throttle cable, idle speed screw, and idle mixture needle per the service manual.
4) Confirmed choke adjustment per manual.
5) Cleaned carb fuel screen. Had a small amount of debris in it, which I cleared out.
6) Checked gas tank vent line. No dips and is free and clear.
7) Checked fuel filter and it was clear and didn't notice anything odd about the fuel in the filter bowl.
8) The carb squirts gas when the throttle is pumped.
9) The plugs are a little wet and smell of gas when I checked.
My battery started to die this evening so I will need to charge that before further testing. Next on my list is to confirm I'm getting spark to each cylinder with my timing light.
Anyone have any other thoughts? Sorry for the large dump of data here, just trying to throw everything out there to give an overall view of what's going on. Thanks!
