1978 jonhson 70 hp idle adjustment??

[mtduckhunter]

where is the idle adjustment on this motor? its running high RPM's in neutral.

 

[Theoutdoorsman]

Re: 1978 jonhson 70 hp idle adjustment??

I'd strongly suggest you purchase a service manual prior to making any adjustments. Turn the wrong screws and you'll be in the market for a new powerhead soon.

 

[mtduckhunter]

Re: 1978 jonhson 70 hp idle adjustment??

thanks with my luck the worst will happen!

 

[Boblester40]

Re: 1978 jonhson 70 hp idle adjustment??

The idle screw is the lower of the two screws located on the levers which drive the carb and ignition timing adavnce . The top screw is the throtlle stop screw, just make sure it is not a problem with the control links when in neutral the lever should sit against the lower idle screw , if it not it is most likely a problem with the levers somewhere .

Rgds
bob

 

[jtexas]

Re: 1978 jonhson 70 hp idle adjustment??

 

[Toddo1]

Re: 1978 jonhson 70 hp idle adjustment??

Jtexas......great pic! Alot of 70 owners should benefit from this!