helokittylovr
Seaman Apprentice
- Joined
- Feb 9, 2010
- Messages
- 46
I hi i have a 1955 johnson QD-16 10hp outboard and i am trying to switch it over to a single line fuel line.
Ok so here i go
my pump is from a John Deere riding mower 25hp so it should be big enough i have good pulse but it just isn't drawing it up the hose
I also ran new fuel lines.
I started with the vac hose block then after that didnt work i taped the motor and installed a pulse barb
I drilled and taped the side plate on the motor and installed a nipple for my pulse port
I blocked the passage from the old pressure port nipple.
I also took the little filter in the carb bowl out and put a filter in the fuel line from the tank.
I have tried 3 primer bulbs and they all do the same thing there is a little back flow with the check valve.
when i pump the primer bulb it fills the carb. then it starts up clean ( no sputtering, kicking, revving )then it hiccups and then acts like its running out of gas and reeves then stalls/dies also after it dies i can pump the primer bulb a few times like it just used the fuel that I pumped into the carb. I then installed a clear fuel filter and can see what is happening I can fill the filter and as it runs the fuel gets sucked out of the filter but never pulls new fuel into the filter so when the filter is empty it dies. I made sure that the tank and the internals were all working and started the motor and it runs until the the fuel filter is empty. i changed the primer bulb thinking that the primer was not holding enough pressure and I shortened the hose thinking that the longer hose would need more drawing power but that didn't work so i picked up the tank after I started it and fuel filled the filter and the motor kept running without having to pump the primer bulb
I have hooked up the hose to the pump directly and bypassed the fuel fitting and still not enough suction to pull fuel into the filter
also I put the end of the hose directly into a gas can thinking that there would be no resistance don't know but I've done everything that i can to make this work.
Ok so I've tried everything i can think of and now i'm stuck please help
Ok so here i go
my pump is from a John Deere riding mower 25hp so it should be big enough i have good pulse but it just isn't drawing it up the hose
I also ran new fuel lines.
I started with the vac hose block then after that didnt work i taped the motor and installed a pulse barb
I drilled and taped the side plate on the motor and installed a nipple for my pulse port
I blocked the passage from the old pressure port nipple.
I also took the little filter in the carb bowl out and put a filter in the fuel line from the tank.
I have tried 3 primer bulbs and they all do the same thing there is a little back flow with the check valve.
when i pump the primer bulb it fills the carb. then it starts up clean ( no sputtering, kicking, revving )then it hiccups and then acts like its running out of gas and reeves then stalls/dies also after it dies i can pump the primer bulb a few times like it just used the fuel that I pumped into the carb. I then installed a clear fuel filter and can see what is happening I can fill the filter and as it runs the fuel gets sucked out of the filter but never pulls new fuel into the filter so when the filter is empty it dies. I made sure that the tank and the internals were all working and started the motor and it runs until the the fuel filter is empty. i changed the primer bulb thinking that the primer was not holding enough pressure and I shortened the hose thinking that the longer hose would need more drawing power but that didn't work so i picked up the tank after I started it and fuel filled the filter and the motor kept running without having to pump the primer bulb
I have hooked up the hose to the pump directly and bypassed the fuel fitting and still not enough suction to pull fuel into the filter
also I put the end of the hose directly into a gas can thinking that there would be no resistance don't know but I've done everything that i can to make this work.
Ok so I've tried everything i can think of and now i'm stuck please help
