1956 evinrude simple question! / difficult answer?

[mattman]

Here I go again with these questions about pressurized tanks and the simple function of a 1956 15hp Evinrude outboard. Can anyone please assist a pitiful Engineering mind and outboard motor newbie with the step by step instructions for testing/diagnostics (earmuffs and hose type) and the same for a pressurized tank. Last evening I hooked up my gas tank and and earmuffs and proceeded to attempt a trial test of this engine. It took multiple pulls to even get the engine to turn over. I noticed that A: it would only run with the choke on and B: it would only run while in short spurts after priming the tank. And finally is my tank holding pressure if I cannot depress the button after initial priming? Should it need priming for the first few times starting after a winters rest? Thanks for assisting with this troubled soul. Is anyone with experience in either or both of these available in the Richmond Virginia area?

 

[dkondelik]

Re: 1956 evinrude simple question! / difficult answer?

'Afternoon Mattman,<br /><br />This is more of a bump for your post then an answer.<br />I know OF these of these fuel systems but am not terribly familiar with them.<br /><br />I think that you're on the right track with the preasurization quest. I would suspect a clogged or collapsed fuel line or clogged tank pickup<br /><br />I godda presume that you've already confirmed/cleaned the carb and that the float/valve isn't stuck shut and channels & jets aren't clogged.<br /><br />Given all of the above, use a nail or somthing to open the valve on the "gas" line that plugs into the motor. I don't know if you'll have to plug the "presure" line. Then prime the tank. Gas ought to flow out of the "gas" line.<br /><br />Hopefully someone will soon be along who REALLY knows this tank system.<br /><br />Good Luck<br />HAVE FUN!

 

[Chinewalker]

Re: 1956 evinrude simple question! / difficult answer?

I've found that all else being equal (tank in good shape) that sometimes the carburetor filter can be a little plugged up, enough that priming the tank forces fuel through it enough to start the motor. However, there's not enough pressure built up in the tank to keep the fuel flowing. I'd make sure the carb and filter (in base of carb bowl) are clean...<br />- Scott

 

[mattman]

Re: 1956 evinrude simple question! / difficult answer?

thanks, guys... I have only had the motors for a week. I purchased both for $100.00 and they are in great shape. I have not had the chance to clean the carbs as I should. I plan on that this evening. I did disassemble the tank, cleaned, reassembled and checked afterwards for leaks. I now will delve into the carb and let you all know how it works. Thanks, for the info.<br /><br />Matt

 

[DJ]

Re: 1956 evinrude simple question! / difficult answer?

mattman,<br /><br />Once the primer button becomes hard to push, your tank is pressurized. The second line keeps it that way.<br /><br />I believe your issues are with the carbs.

 

[bowhuntrrl]

Re: 1956 evinrude simple question! / difficult answer?

Unless you are a fanatic and want to maintain the "antique" pressurized tank, I would get rid of it!!! It's an accident waiting for a place to happen. I've converted several of these older motors over. You scavenge a fuel pump from a junk engine that has one, preferably '60s vintage, and mount on to your engine. The hardest part is finding a place in the crankcase to pull the pulse off of. As I recall, there is a boss on the starboard side near the back of the motor that we drilled through . Then we installed a hose barb and plumbed the fuel lines. Now you can use a regular , late style tank with no worries about burning down your boat or going up in flames yourself !!!

 

[rolmops]

Re: 1956 evinrude simple question! / difficult answer?

Hello.<br />The seloc Johnson/Evinrude outboard certified textbook #1 (1956/1972 engines up to 40 horse)has a very readable and easily understood section about everything you wanted to know about pressure tanks and were afraid to ask.Including drawings of the parts.<br />This is all written for people who are total beginners and it starts by presuming you do not have any technical experience.<br />With this manual in your hand you will be talked through every problem you can imagine.<br />If that does not cut it for you,you can call 585-323-1010 and talk to Bill Mayer who is willing to take your old pressure tanks and exchange them for cleaned out refurbished ones.He will open his marina in rochester,NY probably in another 2 or 3 weeks for this summer.If you rather fix it yourself than he has all the needed parts.<br />Good luck.<br />ps.<br />To add to chinewalker,another filter you may want to clean is the one at the bottom of the fuel pickup inside your pressure tank.<br />These pressure tanks hold only 4 pounds pressure.They are no more dangerous than other fuel tanks.Probably less so, because if your fuel tank develops a leak (rare!)then your engine will stall very shortly afterwards because there is no pressure to push the gas.Besides they are made of good metal,not tearable plastic.

 

[alcan]

Re: 1956 evinrude simple question! / difficult answer?

Hi matt<br />Quite often the o-rings in the fuel line connector leak. You may be leaking presure air there. Do not discard the connector as they are expencive. Replace the o-rings if needed. These tanks will hold presure for some time. It is concidered prudent how ever to loosen the fill cap and depresureize while not in use. these motors like to sneeze a little upon first starting up, I believe this is do to running a bit lean until the motor can presure up the tank and get caught up. A few pushes on the primer botton should help. Up grading to a pump system is great if you need or want to. This system is relyable and safe if maintained and opperated correctly. Keep in mind that this system was designed back when people were expected to think and be responsable for their own actions.

 

[Yepblaze]

Re: 1956 evinrude simple question! / difficult answer?

The button will pressure up the carb, filling the bowl. The motor will pressurise the tank. If the tank is totally full of fuel and not too far below thw level of the motor itself, a few pumps to fill the carb bowl, choke it, twist the throttle to the start position, pull the rope. It fires up. Now with one hand try pushing in the choke slowly, give the primer button another push or two, while maintaing the throttle speed. (three hands maybe)<br /><br />You may need to set the idle mixture to full rich to keep it from sneezing till it warms up a bit.<br /><br />If the gas tank is less than nearly full, it may require some maintained moderate RPM's to keep the tank adequitely pressurizsed to operate nicely.<br /><br />Although this may not be the way the book reads, it's about as close as I can explain it.<br /><br />It's so much better to have it attached to a boat and be able to pull away from the dock, get underway, let it warm up a bit, before you decide on the final slow and high speed adjustments. These might even change somewhat as the tank level lowers or if the tank is higher or lower from the motor from the last time it was run.<br /><br />I found that as the tank got below half full I would experience some stalling during extended slow operation, but then again I think my tank gasket leaks slightly.

 

[rolmops]

Re: 1956 evinrude simple question! / difficult answer?

Reading your question again I saw you mentioned earmuffs.<br />As far as I know,there is no way you can use the earmuff type on a 1956 engine,unless you somehow found the right type of attachment for your engine.<br />Chances are ,you may have to use a barrel.

 

[papasage]

Re: 1956 evinrude simple question! / difficult answer?

there was an atachment that was made for the older motors had one but never used it . when using a barrel the exzoust coming up will not let the motor idle smooth becouse of the like of oxygen in the air. use a fan to blow the exzoust away or a hose with asprayer misting over the top of barrel .