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Evinrude 9.5, How to adjust the low speed idle needle?

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sailor88

Member
Got a 1965 Evinrude 9.5HP 9822 recently, The engine came with cracked fuel line, exposed wire and dirty carbs, I got fuel line replaced, wire wrapped and car cleaned and rebuilt. It runs ok now, but I found even at cold start I didn't have to close the choke, actually it won't start if I close the choke. is that bad? I guess maybe it has sth to do with the needle? I did what the manual says that screw in the needle all the way, then back out 1 1/2 turns, but how do I proceed from here? How to I adjust the needle?
 
The procedure is so to screw it all the way in then 1,5 turns out and then hold the throttle where it just about stays running, then adust the knob in 1/8 turns and adjust the throttle. Remember that it takes a few seconds for the engine to respond to the new needle position so take it slow.
 
(Carburetor Adjustment - Single S/S Adjustable Needle Valve)
(J. Reeves)

Initial setting is: Slow speed = seat gently, then open 1-1/2 turns.

Start engine and set the rpms to where it just stays running. In segments of 1/8 turns, start to turn the S/S 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 (sounds like a mild backfire). 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 adjustment, 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.
 
Essentially the same way. 1 carb at a time.

After you do each, repeat again. Be sure to turn slowly because the fuel mixture in suspension within the crankcase must stabilize with each adjustment. Engine also needs to be at normal operating temp.

As said above, should be in the water or submerged approx the same distance in a barrel. This is for exhaust back pressure. If you run it on a hose it will be too lean in real life.
 
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