mrallen007
Petty Officer 1st Class
- Joined
- Aug 19, 2010
- Messages
- 234
Ok. I've been working for a while to narrow down an outboard issue. The long and short of it is the thing won't stay running. I'll spare you the details.
I went to West Marine today to buy a new fuel tank. A guy there agreed it sounded like a fuel delivery problem (clogged lines, clogged jets, fuel pump, something). He suggested this. He said to pull the fuel line from the carbs and point it down into another tank or coffee can or something to catch the gas and turn the key to turn the motor over. He said the way the fuel pump works is the pistons drive the diaphram in the fuel pump. So, merely running it off the starter should pump fuel into the coffee can if everything is running well. By doing this I can begin to isoloate the problem. If I get fuel, the fuel delivery to that point works and I should look at the carbs. If not, then something is wrong and I can begin so suspect the fuel pump.
My first question for all you guys is this. Does this theory hold water? Will this work the way he says?
At any rate, I tried it. Here is what happened.
1. Pulled the fuel line from the carbs and pointed it down the snout of another tank.
2. I primed the bulb and fuel gushed through the lines into the gas can.
3. I ran the starter and not another single drop came through the line.
4. I removed the other gas can to get a better look.
5. I ran the starter some more and not a drop of gas came through the line.
So, now... Should that much fuel rush through the system by squeezing the primer bulb? Would that not flood the system? And since nothing came out when I ran the starter, do you agree this sounds like a fuel pump rebuild??
Long post I know, but I'm hoping this puts me to the end of a longstanding and annoying problem. Any help is appreciated!!!
Billy
I went to West Marine today to buy a new fuel tank. A guy there agreed it sounded like a fuel delivery problem (clogged lines, clogged jets, fuel pump, something). He suggested this. He said to pull the fuel line from the carbs and point it down into another tank or coffee can or something to catch the gas and turn the key to turn the motor over. He said the way the fuel pump works is the pistons drive the diaphram in the fuel pump. So, merely running it off the starter should pump fuel into the coffee can if everything is running well. By doing this I can begin to isoloate the problem. If I get fuel, the fuel delivery to that point works and I should look at the carbs. If not, then something is wrong and I can begin so suspect the fuel pump.
My first question for all you guys is this. Does this theory hold water? Will this work the way he says?
At any rate, I tried it. Here is what happened.
1. Pulled the fuel line from the carbs and pointed it down the snout of another tank.
2. I primed the bulb and fuel gushed through the lines into the gas can.
3. I ran the starter and not another single drop came through the line.
4. I removed the other gas can to get a better look.
5. I ran the starter some more and not a drop of gas came through the line.
So, now... Should that much fuel rush through the system by squeezing the primer bulb? Would that not flood the system? And since nothing came out when I ran the starter, do you agree this sounds like a fuel pump rebuild??
Long post I know, but I'm hoping this puts me to the end of a longstanding and annoying problem. Any help is appreciated!!!
Billy
