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| Author |
Message |
    
Bob McLellan
New member
Username: bobmc
Post Number: 1
Registered: 07-2009
| | Posted on Monday, July 06, 2009 - 01:40 pm: | 
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I was given a 2 HP Johnson outboard, the model # is 2R79A and I was wondering what year it is. It was stored for years and it will run but you have to adjust the carb settings constantly to keep it running and there does not seem to be a correct place for the settings. I'm thinking a carb overhaul would be the answer. Any advice would be greatly appreciated |
John Parker
Member
Username: bankerjohn
Post Number: 86
Registered: 05-2008
| | Posted on Monday, July 06, 2009 - 02:30 pm: |
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1979 model
Definitely due for a carb cleaning and re-build! |
Joe Reeves
Senior Member
Username: joereeves
Post Number: 7611
Registered: 02-2001
| | Posted on Monday, July 06, 2009 - 02:54 pm: |
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After you make sure that the carburetors are clean:
(Carburetor Adjustments - Two Adjustable N/Vs)
(J. Reeves)
Initial settings are: Bottom high speed = seat gently, then open 1 turn out. Top slow speed = seat gently, then open 1-1/2 turns.
Setting the high and low needle valves properly:
NOTE: For engines that DO NOT have a shift selection, obviously there is no NEUTRAL position. Simply lower the rpms to the lowest setting to obtain the low speed needle valve adjustment.
(High Speed) Start engine (it will run pretty rough), shift into forward gear, take up to full throttle. In segments of 1/8 turn, waiting for the engine to respond between turns, start turning in the bottom high speed needle valve. You'll reach a point whereas the engine will either start to die out or spit back (sounds like a mild backfire). At that point, back out the needle valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest setting.
(Low Speed) Slow the engine down to where it just stays running. Shift into neutral. Again in segments of 1/8 turns, start to turn the top needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running. Eventually you'll hit the point where the engine wants to die out or it will spit back. Again, at that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.
When you have finished the above adjustments, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.
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 store at:
http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store |
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