retroicon
XX-xx-XX-xx-XX
Unfortunately I'm back, I thought I had the Blaster figured out, but after getting it on the water, it ran like crap, was really hard to restart, and now I can't seem to get it started again.
Here's where I'm at.
701 bored 1 over, with a 4mm Stroke. MSD enhancer, factory blaster mod pipe, dual 46's on a pro-tec dual manifold. Compression is about 205lbs on an old RPM Racing Girdled Head kit.
Fuel is flowing through the lines. When I keep the motor turning, I can hear it returning to the fuel tank.
The fuel lines are all 100% clear of blockages.
The fuel lines are running direct from the tank, one line to each carb. There is no selector in line.
The primer is on the return lines, not on the main.
The check valve is working properly.
The fuel lines are 100% hooked up properly. I've checked, and re-checked a million times. Input on the lower nipple, return on the higher nipple, and pulse on the pulse plate. (fuel is moving through the carbs, and getting back to the tank thru the return line)
I have fuel filters in line, and can see fuel moving through them, and both are filling up when turning the motor.
Pulse is strong on both cylinders into the carbs.
The spark is strong on both cylinders when plugged in, and touched to the head. (can't tell when they're in the head obviously)
I pulled the carbs off today, and took them apart. They were clear of blockages, nothing damaged, nothing appears bent, broken, or torn in any way. The diaphrams looked good, no tears.
The 46's are running a 2.5 n/s 190 high speed jet, and 120 low speed. The springs are silver, but I couldn't tell which ones they were.
The engine passes a leakdown test, and holds pressure fine.
The fuel lines are tight, the tank remains pressurized if I blow in to the check valve line.
I'm at a loss at this point. There's spark, fuel pressure, and the only way to start the thing is to prime the hell out of it to the point that when it does fire, it revs high for a second because there's so much fuel in the cylinders. I can't give it one squirt, it has to be 2-3 full squirts to even get it to fire at all, even after being warm.
I know someone is going to recommend testing pop-off pressure, and I do have a gauge, I just haven't had a chance to actually do it yet today. Do I have to pull the carbs to test pop-off, or is there some way to leave them on the motor and test it that way?
Thanks
Here's where I'm at.
701 bored 1 over, with a 4mm Stroke. MSD enhancer, factory blaster mod pipe, dual 46's on a pro-tec dual manifold. Compression is about 205lbs on an old RPM Racing Girdled Head kit.
Fuel is flowing through the lines. When I keep the motor turning, I can hear it returning to the fuel tank.
The fuel lines are all 100% clear of blockages.
The fuel lines are running direct from the tank, one line to each carb. There is no selector in line.
The primer is on the return lines, not on the main.
The check valve is working properly.
The fuel lines are 100% hooked up properly. I've checked, and re-checked a million times. Input on the lower nipple, return on the higher nipple, and pulse on the pulse plate. (fuel is moving through the carbs, and getting back to the tank thru the return line)
I have fuel filters in line, and can see fuel moving through them, and both are filling up when turning the motor.
Pulse is strong on both cylinders into the carbs.
The spark is strong on both cylinders when plugged in, and touched to the head. (can't tell when they're in the head obviously)
I pulled the carbs off today, and took them apart. They were clear of blockages, nothing damaged, nothing appears bent, broken, or torn in any way. The diaphrams looked good, no tears.
The 46's are running a 2.5 n/s 190 high speed jet, and 120 low speed. The springs are silver, but I couldn't tell which ones they were.
The engine passes a leakdown test, and holds pressure fine.
The fuel lines are tight, the tank remains pressurized if I blow in to the check valve line.
I'm at a loss at this point. There's spark, fuel pressure, and the only way to start the thing is to prime the hell out of it to the point that when it does fire, it revs high for a second because there's so much fuel in the cylinders. I can't give it one squirt, it has to be 2-3 full squirts to even get it to fire at all, even after being warm.
I know someone is going to recommend testing pop-off pressure, and I do have a gauge, I just haven't had a chance to actually do it yet today. Do I have to pull the carbs to test pop-off, or is there some way to leave them on the motor and test it that way?
Thanks
