1957 18 johnson sea horse fuel problem

[kennas dad]

I am working on this motor, and having a problem with the fuel delivery. The old metal tank was no good and got tossed. It was replaced with the new plastic style. Now the problem is, it only has 2 prongs on the hose, and the motor has 3. I know one is fuel the other is air. What we're running into is when we prime the fuel into the filter bowl, it doesn't seem to be getting to the carb. The lines are open and not clogged. But when we prime it again, fuel squirts everywher out of the fitting going into the motor. Could we have too much pressure in the tank? Getting frustrated!!

 

[tashasdaddy]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

welcome to iboats. you either have to convert the motor to a fuel pump, or you have to get a replacement tank. check your model #, i thought they did away with the 2 line tank, before 1968. your motor pumps air into the fuel tank, which forces fuel to the motor. it does not have a fuel pump to suck fuel from the tank. what is your model #, maybe we can direct you on converting to fuel pump.

 

[kennas dad]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

Thank you very much, the model number is FD 11

 

[Joe Reeves]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

The FD-11 model is a 1957 18hp Johnson. Follow Tashasdaddy's advice as above.

 

[kennas dad]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

How difficult is it to convert it to a fuel pump? and where would i get one?

 

[tashasdaddy]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

have not done an 18, but we will find out if it is possible. i edited your title.

 

[F_R]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

Certainly, it's possible. Just get parts from a newer 18-20-25 hp motor of 22 cu.in. size donor motor. You need the bypass cover, fuel pump, fuel line connector, hoses, clamps. Piece of cake.

 

[tashasdaddy]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

here is a basic plan, you just need the right parts for the motor.
http://forums.iboats.com/showthread.php?t=205628

 

[F_R]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

These are the parts you need. Any 22 cu in 18-20-25 hp motor 1960-up into the late 1970s --till they changed the powerhead design. The pump in the picture is obsolete, but there are plenty of them that will fit in it's place.

 

[tashasdaddy]

Re: 1968 johnson sea horse fuel problem

Re: 1968 johnson sea horse fuel problem

ok when to http://shop2.evinrude.com/ext/index.aspx?s1=bf6ad09c53cead335fcfd8a6471c0f7f
looked up 1968 18 hp , got these part #s

Pump 382871 $78.95
by pass cover 314818 $35.49
by pass gasket 314818 $ 1.00
2 bolts for pump 309654 $ 2.66 ea

please verify numbers yourself. i take no responsibility for accuracy.