Re: 61 Evinrude 40HP- no power/ burns tons of gas
The "cam follower"(roller) activates the throttle lever when it makes contact with the "throttle control cam" which is the plate with the shiney edge attached to your magneto armiture plate. Everything appears to be there as far as I can tell. FYI, the link&sync procedure insures that the carburetor does not open beyond idle until the ignition timing is significantly advanced or it will not make full power and may stumble under heavy load and acceleration.
To get it synchronized, you have to first align the scribe mark on the "throttle control cam" with the "pointer" on the manifold. On early model motors, that requires loosening screws on the armiture plate and adjusting the cam. The throttle must be held in the closed position while making this adjustment.
Your motor appears to be a later model that makes the same adjustment by loosening the clamping screw on the linkage. There is an eccentric bushing on the carb end of the throttle control linkage that makes the cam follower adjustment and removes all slack from the linkage. Refer to your manual for that procedure. Mine has pictures.
I believe that spring action you are feeling is the "fuel saver feature" that holds the ignition advance at maximum while the throttle is reduced. That clamping screw you pointed out in the video is where you make that adjustment. The proper adjustment requires that the armiture plate contacts the stop at the same time the speed control linkage "collar" engages the pivot pin. NOTE: This adjustment has nothing to do with the throttle synchronization!
See my signature before you buy into what I am saying because I make no claims of expertise. Good luck!
The "cam follower"(roller) activates the throttle lever when it makes contact with the "throttle control cam" which is the plate with the shiney edge attached to your magneto armiture plate. Everything appears to be there as far as I can tell. FYI, the link&sync procedure insures that the carburetor does not open beyond idle until the ignition timing is significantly advanced or it will not make full power and may stumble under heavy load and acceleration.
To get it synchronized, you have to first align the scribe mark on the "throttle control cam" with the "pointer" on the manifold. On early model motors, that requires loosening screws on the armiture plate and adjusting the cam. The throttle must be held in the closed position while making this adjustment.
Your motor appears to be a later model that makes the same adjustment by loosening the clamping screw on the linkage. There is an eccentric bushing on the carb end of the throttle control linkage that makes the cam follower adjustment and removes all slack from the linkage. Refer to your manual for that procedure. Mine has pictures.
I believe that spring action you are feeling is the "fuel saver feature" that holds the ignition advance at maximum while the throttle is reduced. That clamping screw you pointed out in the video is where you make that adjustment. The proper adjustment requires that the armiture plate contacts the stop at the same time the speed control linkage "collar" engages the pivot pin. NOTE: This adjustment has nothing to do with the throttle synchronization!
See my signature before you buy into what I am saying because I make no claims of expertise. Good luck!
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