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63 evinrude wont run at idle

J

jr43

Member
18302L rebuilt carb Set high speed jet to 1 turn out Low to 1 1/8 out i have adjusted low jet down to 3/4 and up to 2 with little change.the coils seem to be good and points set to .020 ,compression is 80lbs. runs perfect on high end around 4200 at low rpm it seems to have a miss then it stalls. anyone have any ideas.
 
There's a scribe mark on the metal cam that slides againt the carburetor throller cam roller. The throttle butterfly should just start to open when the scribe mark is dead centered with that roller... check it.

(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.

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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(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 auction at:

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

 
the butterfly is a 1/4 open at scribe mark if I choke it the engine smooths out. made a rod 3/16 shorter than the connector link that was on it and i get it to run fine.how does one go about adjusting the cam plate to be in time with the correct link ?
 
jr43 said:
the butterfly is a 1/4 open at scribe mark if I choke it the engine smooths out. made a rod 3/16 shorter than the connector link that was on it and i get it to run fine.how does one go about adjusting the cam plate to be in time with the correct link ?
Click to expand...

The rod that connects the roller to the butterfly shaft CANNOT be lengthened or shortened... it is a set length and must stay that way.

The cam has two small (5/16" I think) hex bolts attaching it to the armature plate. the bolt towards the port side is in a slot that allows the cam to be moved in or out to align the scribe mark with the roller.
 
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