Fuel pump Gale 12S13B

[snipe1905]

I just got this motor, and I also have an Evinrude 15 and an Evinrude 18, so I'm generally familiar with the motors. I'm assuming I'll have to replace the fuel pump and I've seen the Sierra 18-7350 recommended here, but the hose sizes are wrong. All the connections on the motor, gas line fitting, pump and carb, are 5/16, but the pump to carb line on the Sierra is much smaller, forgotten the size (I have one of those Sierra ones on yet another 18 I have, so I know). I have a Sierra 18-7351 pump where the input is 5/16 and the output is 3/8, so I thought I'd use that with a reducer. Does this sound OK, or does anyone have another idea?
There are dozens of fuel pumps on eBay, mostly knockoffs of one or the other of the above pumps, but as far as I can see they never tell you the size of the fuel line connections. Does anyone have experience with using a knockoff? They're so cheap I think it makes sense to use them and just replace them every year.
Finally, I am aware of the crankshaft seal problem, and already have a new one. Fortunately the powerhead came off the lower unit without the slightest problem, so it must have been a freshwater motor.
I really like this motor. I'm sure I'll be doing all the usual stuff but it has good compression and should run fine.

 

[rolmops]

A Gale is an Evinrude made machine using last years Evinrude everything. If you know the production year of your Gale. Just check the evinrude parts catalogue of the year before that and you should find the right numbers. Your Gale is a 12 hp 1956 so the 1955 Evinrude should hold the right numbers that you need. If it is a very late in the year produced outboard it may already have some 1956 stuff.

 

[racerone]

???----These pumps are very reliable / simple.----So easy to replace the diaphragm.-------These motors did not use roller bearings on the crankshaft like the 18HP Johnson / Evinrude did.

 

[snipe1905]

???----These pumps are very reliable / simple.----So easy to replace the diaphragm.-------These motors did not use roller bearings on the crankshaft like the 18HP Johnson / Evinrude did.

Thanks, I would rather keep the original pump, but I thought there were no parts available, Is it hard to make a diaphragm? What material do you use? For other parts, I've gotten a parts list.

 

[F_R]

There are some surprises in store for you. 1st, the hose fitting in the carburetor bowl is replaceable. Simply replace it with the size you need. Or of course, you could replace the bowl if need be.

2nd, there is no lower seal in a 12S13B. It doesn't need one because it is mounted on the older style exhaust housing/midsection. The troublesome seal (p/n 303804) you mention was a problem with the newer exhaust housing which blew exhaust and hot water toward the crankshaft/seal area. Evinrude and Johnson motors suffered the same fate.

Are you saying the motor has already been converted from gravity feed to a fuel pump? If so, you are correct, there are no parts available for that pump of that era. I suppose all things are possible, but the diaphragm in that old pump was a two-layer affair with a rivet through the middle along with metal support washers. There is also a spring which will hop out of place without the riveted diaphragm.

Yeah,I know, that motor was built to accept a fuel pump kit. Big surprise, it had a float needle & seat with a huge hole to allow sufficient flow from just gravity pressure. The extra pressure from a fuel pump often caused the float needle to be forced off the seat. Just replace the float valve you say? Yep, except they have different thread sizes.

 

[Willyclay]

When F_R posts in a thread, I pay attention. I am still learning from the pro's. Good luck with that great old motor!

 

[racerone]

There are numerous fuel pumps that can be fitted to this motor.----In my opinion almost every shop would have some around in a bin.-----Any smaller ( up to 25 HP ) Johnson / Evinrude from about 1965 to 2005 uses the same style of pump.----I say it a lot, very easy to adapt something.

 

[snipe1905]

Thanks, everybody. Yes, it did already have a pump, so maybe the float needle has been addressed. Thanks to F_R I will replace the fitting on the card with a 3/8 nipple and then I can use the Sierra 18-7351 pump (or a knockoff).
I'm trying not to take it too far apart at any one time. The throttle, steering and transom clamps were all stuck when I got it so I've had to take the midsection pretty much all apart. With that apart, I could soak the clamps and eventually got them free. I've seen various things recommended for this, but I had a tub of diesel fuel so I used that. The steering tube came out pretty easily so that's OK now, and I earlier had gotten the throttle free. I'm not going to look at the gearcase or electrical system until I get the midsection back together. It's fun working on this stuff when it doesn't matter how much progress I make in a given time.