missing part, what is it ?spring or linkeags

[starcraft guy]

hi all<br /> 1960 40 hp johnson,where carb mounts to motor<br /> there is a little black roller thats looks like <br />it should ride along a cam under flywheel,looks to me that there should be a spring or linkage hooked to carb ,witch is it and where does it hook in?<br /> Thanks river run

 

[12Footer]

Re: missing part, what is it ?spring or linkeags

Can you post a pic of it?

 

[JB]

Re: missing part, what is it ?spring or linkeags

Howdy River Run.<br /><br />You figured it out well.<br /><br />The roller is on the carb linkage. Right?<br /><br />Its function is to synchronize the ignition timing with throttle setting by moving a cam on the magneto plate against a spring. If the spring breaks or the plate gets stuck you lose synch and would probably have poor running at low speed.<br /><br />Good luck.

 

[starcraft guy]

Re: missing part, what is it ?spring or linkeags

No scanner on this end 12Footer,The roller does not come off with carb linkage but stays on motor <br />i see where the spring hooks to roller but where does it go to on carb linkage?<br /> thanks, so much guys <br /> river run

 

[alcan]

Re: missing part, what is it ?spring or linkeags

Hi riverrun<br />The spring hooks under the roller as you note. Then it hooks to a little hole located on the crankcase or intake manifold. So as to hold the roller against the cam. The other end of shaft that the cam is on hooks to the carb via linkage.

 

[starcraft guy]

Re: missing part, what is it ?spring or linkeags

Thanks alcan<br /> The spring thats hooks to the intake manifold was on the motor ,There seams like there should be a spring going from the bottom of the arm that the wheel is on going back to carb, In order to hold wheel against cam it looks like the spring <br />should be pulling back ,the wheel is on a ( L ) shaped arm that pivets at the 90" wheel would be at top of L and a hole at the bottom for spring or linkage , i must be missing something<br /> thanks again <br /> river run

 

[starcraft guy]

Re: missing part, what is it ?spring or linkeags

I was reading reply to my Q, I cant seem to get how the spring keeps roller to cam the way it is, I just bought the motor a short time ago , I am thinking that maby roller has been put on backwards befor i got the motor, pic, would help me alot.<br /> river run

 

[starcraft guy]

Re: missing part, what is it ?spring or linkeags

I am waiting for a service manual,