last winter I picked up a rd 17e 1955 Johnson 25 hp.i bought it as kind of a non runner. well today was the day to start it. it starts then dies. come to find out I have no air pressure coming from the engine to push the fuel out of the tank. is it easier to switch to one line with a fuel pump? or find out whats wrong with the system and rebild the tank while iam at it. thanks Bob
How long did the engine run?
Its needs a little time (30sec ?) to build up some pressure especially if there's not much fuel in the tank.
The little primer button is just to pump some fuel into the carb, not to pressurize the tank.
Pick-up tube in the tank clean?
These tanks are bullet proof once you get them working.
I pump it till the pump gits hard to pump and the sediment bowl is full. it runs about 5 sec and then quits. then I pump it up and do it all over agane. theres no presser coming out of the fuel line from the motor. thanks bob
If the carb is full of fuel, it should run for 30 sec or so, even if the hose connector is disconnected.
I doubt that a 5 sec. run would be enough time to build up pressure in the tank.
Can you keep the motor running longer by more priming?
The little "O" rings in the connector may need replacing too.
May be best to disassemble the fuel lines in the engine and blow then out, or replace them if they look original.
well I just removed the filter in the sedment bowl and now I can fill the carb. motor runs till carb is out of fuel. it pumps good pressher. but the tank will not pressher up. and the cap is tite. iam going to try another tank. thanks Bob
Bob, couple of things you might want to check. Since the pressure in the tank comes from the lower part of the motor...piston downstroke, you might have a leaky lower engine gasket that is letting the air out somewhere else or did you check the gasket on the tank cap? if it is dry it will not seal the tank. Look for a leaky/brittle air line from the jug. If you can turn or twist the hose where it is connected it will leak, has to be tight.
Just some thoughts
if I pump up the fuel tank to fill the carb and then un hook the tank and then start the motor it will blow air out of the air side of the fuel fitting.so Iam now thinking that its a fuel tank problem. Bob
Ok I just tried a different gas tank. now it runs real good. it pops now and then at idel but it runs beter when it warms up. now where can I find some 2 line fuel hose? thanks for all the help guys. Bob