1960 fuel pump conversion

[HighTrim]

Re: 1960 fuel pump conversion

They were quite proud of the remote pressure tank itself. This allowed the weight of the motor to drop by 12 to 16 lbs, it made it so you didn't have to bring jerry cans of fuel with you, and the remote tanks held much more volume than the integral tanks, increasing the range you could travel. Also helped balance the motor when carrying it as you could carry the motor in 1 hand, and the tank in the other. Environmental pollution declined due to not having to reach out to fill the tank, as the 12' double fuel line was long enough to put the tank on the dock while fueling. Final benefit was being able to put the tank up near the bow for weight distribution.

It almost didn't happen when the QD debuted though, due to internal battles between Ralph Evinrude and Steve Briggs. Mr Briggs won of course as we all know now.

Ralph felt vindicated however as one of the early QDS was used on an African expedition. The story goes that for some reason the motor failed to pressurize the tank, so they hired a young native to manually pump the pressure tank primer constantly to keep them out of harms way. Don't want to be stuck with hostiles, crocs, hippos, and the like all waiting for a free meal!

 

[Tom Maslar]

Re: 1960 fuel pump conversion

They were quite proud of the remote pressure tank itself. This allowed the weight of the motor to drop by 12 to 16 lbs, it made it so you didn't have to bring jerry cans of fuel with you, and the remote tanks held much more volume than the integral tanks, increasing the range you could travel. Also helped balance the motor when carrying it as you could carry the motor in 1 hand, and the tank in the other. Environmental pollution declined due to not having to reach out to fill the tank, as the 12' double fuel line was long enough to put the tank on the dock while fueling. Final benefit was being able to put the tank up near the bow for weight distribution.

It almost didn't happen when the QD debuted though, due to internal battles between Ralph Evinrude and Steve Briggs. Mr Briggs won of course as we all know now.

Ralph felt vindicated however as one of the early QDS was used on an African expedition. The story goes that for some reason the motor failed to pressurize the tank, so they hired a young native to manually pump the pressure tank primer constantly to keep them out of harms way. Don't want to be stuck with hostiles, crocs, hippos, and the like all waiting for a free meal!

Awesome Story!--Very informative. I love my pressurized tank....these motors with the tanks in there original patina glory--warts and all, are like time machines on the water.

 

[Tom Maslar]

Re: 1960 fuel pump conversion

I read somewhere that the vacuum draw has to be confined to one cylinder, which explains the use of the cover for vacuum. If you pull it off the manifold it creates a lean condition unless you block an internal check valve on one of the cylinders?--I will see if I can find the article. As far as I know it can be done off manifold if the check valve is internally blocked.

 

[kfa4303]

Re: 1960 fuel pump conversion

Neato! Although, I feel sorry for the guy who was hired to be the human fuel pump. I wonder how did the old motors save 12lbs by not having a fuel pump? That sounds like a lot of weight.

 

[64osby]

Re: 1960 fuel pump conversion

The motor saved weight by not having a fuel tank and the fuel. The weight just moved inside the boat.

 

[Crosbyman]

Re: 1960 fuel pump conversion

I just did my 5.5 ( no bypass cover to get a pulse from) by modifying the intake manifold by removing the check valve and plugging one channel as per You tube video and the book from Max E. Wawrzyniak's book on section 12 FUEL PUMP CONVERSION

I found no mention "blocking" the the check valve.... other than "blocking" ONE of the two channels with epoxy or similar goo .

 

[HighTrim]

Re: 1960 fuel pump conversion

You block one passage, and completely remove the whole check valve assembly. If you do this, be certain you are blocking a pulse passage, and not an oil passage.

 

[Crosbyman]

Re: 1960 fuel pump conversion

HOW TO CONVERT 50s motors from two line tanks - YouTube


nice video ... just my motor size to.

As soon a I have a single line connector I'll put in the B&S pump

 

[HighTrim]

Re: 1960 fuel pump conversion

I think I still have 20 or so left. I had bought 50 this summer.

 

[Chinewalker]

Re: 1960 fuel pump conversion

Back to the OP's original query, the 15032 1960 18hp should not need to be converted to a fuel pump. It should already HAVE a fuel pump. 1959 was the last year for the pressure system.

 

[Cyborg Pirate]

Re: 1960 fuel pump conversion

The 15033 had a fuel pump. The 15032 does not. Trust me I am looking at it right now installing one. Btw.... Replacing the fuel line from filterbowl to the carb. Is it 1/4 inch line?

 

[Chinewalker]

Re: 1960 fuel pump conversion

Maybe yours is early production or something. Parts lists show it should have fuel pump.

In any case, for whatever reason, your motor obviously doesn't have one.

I believe the hose should be 5/32 or 1/8 inch. 1/4 inch is used from fuel connector to the fuel pump - assuming you're using a pump with a filter in the cap. If that's the case, you can do away with the filter that is mounted on the exhaust cover.

 

[Cyborg Pirate]

Re: 1960 fuel pump conversion

Yeah I think that's why it has been so hard to find info on this motor. It must be an early build.

 

[tjandrews]

Re: 1960 fuel pump conversion

I'm sorry to be late with this, but for what it's worth, when I converted my '56 15HP Johnson I used a cover plate from a '58 12HP Gale-built Sea King that I happened to have given to me years before. It fit perfectly, and already had the holes drilled and tapped for the fuel pump. Bought one of the little square pumps on eBay, as well as a used single-line connector, plugged the carb pressure line, and I was good to go. Just for good measure, I added a small inline fuel filter inside the cowl in a spot where it would be easy to replace, just before the fuel pump. Seemed like a good idea at the time, and I didn't see how it could hurt. So far, three seasons, it's run great. Lots of power, starts on the first pull.

 

[HighTrim]

Re: 1960 fuel pump conversion

5/32 is hard to find, unless you go to the dealer.

I use 3/16" line, much more common and available anywhere.