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1986 25hp Evinrude will not stay started

C

carolinabassfisher

New member
New guy here hoping to find some help. The motor in the title will start, but will not stay started unless I push the choke at the ignition box every few seconds. I cleaned the carb well, hoping this would fix the issue, but nothing. I am rebuilding it (it is soaking as I write this) with a kit purchased from this site but am not expecting it to be any better. Could the fuel lines themselves gum up (used fresh fuel, but the motor sat for quite a while without being run)? Are there common issues with the fuel pump I could repair?

Thanks for the help.
 
The bulb in the hose is a manual fuel pump.-------You can use it to test / evaluate the pump on the motor.---------Having to use the choke indicates a fuel problem.---------------Did you remove the high speed jet in the bottom of the bowl to clean it ?????
 
Thanks for the reply racerone - when I cleaned the carb last time, I took it completely apart and soaked it, blew it out. There was no difference in performance.

Is there a procedure for using the hose bulb to check the pump on the motor? Would disconnecting the fuel lines at different points and flushing them help?

The motor used to run flawlessly, but since it sat for so long, I've had trouble with it. Any advice would be greatly appreciated.

Thanks.
 
The high speed jet that is located in the center bottom portion of the float chamber...... I suggest that you clean it with a piece of single strand steel wire as solvent just doesn't do the job of cleaning it properly. If this jet is clogged slightly, as "racerone" suggests, it will result in the problem you are describing.

Have someone pump the fuel primer bulb when running the engine, acting as a manual fuel pump. What effect does this have upon the engine?

(Fuel Pump Diaphragm Test)
(Two Hose Type Only)
(J. Reeves)

Note: This pertains only to the regular Two Hose type fuel pumps.

Leave the hoses attached to the fuel pump. Remove only the two screws that attach the fuel pump to the powerhead. Re-insert those two screws and install a nut to each of them so that the fuel pump is securely clamped together. With the fuel line attached to the engine, pump the primer bulb while observing the pressure/vacuum operating hole on the back side of the fuel pump. Should any fuel leak out that hole, the diaphragm is faulty.

If the diaphragm is faulty, the fuel pump will require rebuilding or replacing. Note that repair kits are not available for all fuel pumps, in which case replacing the pump would be necessary.

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay auction at:

http://shop.ebay.com/Joe_OMC32/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
 
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