fuel pump instead of pressurized gas tank??

[mikethebutcher]

hello
i have a 1957 5.5 hp motor that i can not seem to get going
i rebuilt the carb when i spray starting fluid in it starts and then quickly dies
the problem might be with my pressurized gas tank
someone told me there is a fuel pump you can use instead of a pressurized gas tank....but i can not find it
if anyone can tell me how i can find this fuel pump i would like to say thank you in advance for the help
or if anyone has any ideas why i can not keep this motor running
thank you again
mike

 

[Chinewalker]

Re: fuel pump instead of pressurized gas tank??

If you need to use starting fluid to start the motor, then you have issues likely unrelated to the fuel tank. And get rid of the starting fluid! That stuff will kill your motor as it will rinse away residual oil on the bearing surfaces and cylinder walls! Will also attract moisture if you don't get the motor running long enough to rinse the starting fluid out!

That said, do some basic trouble shooting first. When you prime up the tank, does fuel get to the carb? Remove the bottom needle valve and note whether any fuel drains from the carb. Does any fuel come out when you prime the tank? If no fuel from the carb, remove the fuel line at the carb and prime the tank. Any fuel there? If you have fuel to the carb, and fuel in the carb, then you may have gummed up passages. If you have fuel to the carb, but not fuel in the carb, then your float is probably stuck. If no fuel to the carb, then check the lines all the way back to the tank. Remove the hoses from the tank if you have to and press the primer - note whether fuel squirts from the FUEL nub on the tank.

The pressure system is a proven and reliable system. No need to replace it when you can repair it if needed. Tank rebuild kits are readily available for less than it would cost to buy a fuel pump and related parts....
- Scott

 

[ezeke]

Re: fuel pump instead of pressurized gas tank??

Follow this link and the scroll down for the minority opinion:

http://www.outboard-boat-motor-repair.com/Johnson%20%205.5%20HP%20Seahorse%20Outboard%20Boat%20Motor/Pressureized%20Fuel%20Tanks.htm

 

[F_R]

Re: fuel pump instead of pressurized gas tank??

The pressurized versus the fuel pump system has nothing to do with your problem. Either one will supply fuel to your carburetor if it is working. Neither one will supply fuel to your carburetor if it is not working.

The 5.5 will not accept an OMC factory designed fuel pump. People have cobbled up other systems. Neither one is any more dangerous than the other. Leaking gas is leaking gas, no matter where it comes from. You decide what you want to do.

 

[mikethebutcher]

Re: fuel pump instead of pressurized gas tank??

thank you for the replys on this subject
i will stop using starting fluid i...i did not know that it would do more harm than good
i will check out all my options any i will post on how i make out
thank you again for the answers...it will take me time to learn so i will ask a lot of questions
mike

 

[mikethebutcher]

Re: fuel pump instead of pressurized gas tank??

i just wanted to say "thank you"
i found the problem it was a blockage(fuel line to carb was crimped...most ovious but overlooked)
motor started on second pull....but i now have a new problem
the motor is not pumping water(i stopped the motor right away)
the question is how hard is it to change the impeller?
do i have to remove the power head (1957)or can i remover the lower unit?
thanks in advance for the help
mike

 

[F_R]

Re: fuel pump instead of pressurized gas tank??

You have to remove the powerhead.

 

[R.Johnson]

Re: fuel pump instead of pressurized gas tank??

In regard's to the pressurized fuel tank, it will work fine if every thing is correct. The problem is the quality of double line fuel hose as supplied today. this is moulded, unbraided line with very poor longevity. If you leave that tank in the boat under sun light, or if it is your real unlucky day, in the garage with the fill cap closed, that hose can burst. Thing's can get real fast, and merry from there. Your engine can be hard to convert because it has no fuel by-pass cover's. If you stay with the double line tank, use 1/8" braided , single line fuel hose, and tye strap together for neatness

 

[samo_ott]

Re: fuel pump instead of pressurized gas tank??

Yes, you need to remove the powerhead on the 5.5 to undo the top nut on the shift rod. But it's quite easy. There's only 5 or 6 screws holding the powerhead down from underneath and voila... it's off... Get a new base gasket though for when you put it back on, it's only a few $$$ and can ge gotten at the same place as the impellar... If you have any problems just post your questions and someone will usually answer.

 

[Man On A Mission]

Re: fuel pump instead of pressurized gas tank??

Hello All,

I have a been trying to get my 57 Evinrude 7.5 to run, i had it started but it only runs for a short while and dies, it would not stay at idle speed either it would run very choppy then die.

i changed the spark plugs due to oil being on the plugs and the gap was off so i re-gapped them at .030. rebuilt the fly wheel and replaced the spring.

now the motor will not even turn at all. i have taken the carb apart, when doing that i took the high spee knob out and the low speed knob out, alot of oil and gas came out holes, why is this?? and why is there oil on the plugs.

The other issue i have is this motor did not come with a pressurized ful tank, CAN THIS MOTOR RUN WITHOUT ONE??? i do not think the 57 7.5 has a fule pump does it? if i need one where do i get one or can i put a fuel pump on.

Please, i need some good advice, I thank you in advance.

-Rich

 

[kenmyfam]

Re: fuel pump instead of pressurized gas tank??

Hello All,

I have a been trying to get my 57 Evinrude 7.5 to run, i had it started but it only runs for a short while and dies, it would not stay at idle speed either it would run very choppy then die.

i changed the spark plugs due to oil being on the plugs and the gap was off so i re-gapped them at .030. rebuilt the fly wheel and replaced the spring.

now the motor will not even turn at all. i have taken the carb apart, when doing that i took the high spee knob out and the low speed knob out, alot of oil and gas came out holes, why is this?? and why is there oil on the plugs.

The other issue i have is this motor did not come with a pressurized ful tank, CAN THIS MOTOR RUN WITHOUT ONE??? i do not think the 57 7.5 has a fule pump does it? if i need one where do i get one or can i put a fuel pump on.

Please, i need some good advice, I thank you in advance.

-Rich

Man On A Mission,
Why don't you start your own thread on this. You will most likely get more specialised help. I do not know these motors at all so have nothing to offer you other than my first sentence.
Welcome to iboats

 

[wbeaton]

Re: fuel pump instead of pressurized gas tank??

Hello All,

I have a been trying to get my 57 Evinrude 7.5 to run, i had it started but it only runs for a short while and dies, it would not stay at idle speed either it would run very choppy then die.

i changed the spark plugs due to oil being on the plugs and the gap was off so i re-gapped them at .030. rebuilt the fly wheel and replaced the spring.

now the motor will not even turn at all. i have taken the carb apart, when doing that i took the high spee knob out and the low speed knob out, alot of oil and gas came out holes, why is this?? and why is there oil on the plugs.

The other issue i have is this motor did not come with a pressurized ful tank, CAN THIS MOTOR RUN WITHOUT ONE??? i do not think the 57 7.5 has a fule pump does it? if i need one where do i get one or can i put a fuel pump on.

Please, i need some good advice, I thank you in advance.

-Rich

Its sounds to me like you need a service manual.

Look for a used pressure tank. It will cost about the same as the modifcation before you add the price of a new single line tank and hose.

When you say rebuilt the flywheel do you mean replace the ignition components?

 

[Man On A Mission]

Re: fuel pump instead of pressurized gas tank??

Hey Guys

I have the original manual and the seloc repair manual for this motor, it does not specify if you can run this thing w/out a pressure tank, i need to find that out first, i think that could be the problem.

in additon when i took the carb off there was no filter in it. where csn i get one, the carb kits neevr have them included.

How do i post a tread on this forum, i have no clue.

Thank you for you help, God Bless!

 

[tx1961whaler]

Re: fuel pump instead of pressurized gas tank??

If it has a double fuel line, then it does need a pressure tank.
To create a new post, there is a button at the top left of the forum titled "Create New Post"
If the flywheel will not turn, it is possible that the coils are hitting the flywheel, if they were moved.