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TOPIC: 1971 Johnson 50hp -fuel pump?

1971 Johnson 50hp -fuel pump? 9 years 4 months ago #113650

Hello.
I have a 1971 Johnson 50hp. I've used it the last couple of summers. This year I started it up a couple of times in the driveway briefly. Replaced the throttle cable and I wanted to test it out. I launched the boat and attempted to start it. It ran for a few seconds and died. I haven't been able to start it since.
I replaced the fuel lines with clear ones so that I can see if its moving. The fuel was not going past the fuel pump. A friend rebuilt it for me with a kit. I reinstalled it and still no start. I removed the line from the carburetor and fuel just dribbles out as I crank the motor.
How much fuel should shoot out of this line from the pump?
There is lots of spark and compression. Bowls on carbs are empty.

Thanks.

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Re:1971 Johnson 50hp -fuel pump? 9 years 4 months ago #113656

Take the pump apart again and make sure the passages aren't blocked some how. Make sure they all get blown out. If you had an old hose breaking down a small piece could have come off and gotten lodged in there.

Bob

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Re:1971 Johnson 50hp -fuel pump? 9 years 4 months ago #113669

You replaced the suction fuel line as well?

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Re:1971 Johnson 50hp -fuel pump? 9 years 4 months ago #113683

Hi guys.
Thank you for taking the time to respond to my issue.

I Replaced every fuel line between the tank and carburetor. Fuel was still not getting into the carburetor. I took apart the fuel pump that my friend rebuilt for me and I found that he put one of the springs in the wrong spot (after I searched for a diagram online).
Fuel still wasn't going into the carbs! I took off both carbs and found that the float valves were stuck in both of them!
I put it all back together and it started right up. I was so relieved that I found the problem. :laugh:

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Re:1971 Johnson 50hp -fuel pump? 9 years 4 months ago #113685

Congrats to you!!!!!!!!!!!!!!!! Now go have some fun - it's the weekend.

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Re:1971 Johnson 50hp -fuel pump? 9 years 4 months ago #113701

Good job, congrats, now go run her!!!!!!!!!

Bob

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