70 Johnson idle /stalls

[lotide5]

Bought a 76 Johnson 70.. starts but dies at idle and stalls out midrange. Burned up most of the old gas and 6 gals of fresh.When I push through to full throttle it planes out fine. Compression- top: 125/125/125 middle: 120/120/120 bottom: 115/110/110. What next?<br />Thanks

 

[marinegrh]

Re: 70 Johnson idle /stalls

check for fuel restrictions in the carbs, good place to start

 

[boatin]

Re: 70 Johnson idle /stalls

Unlike automobiles if the motor has been sitting up for more than a year the oil/gas mixture tends to gum up the carbs

 

[OBJ]

Re: 70 Johnson idle /stalls

Hi lotide and welcome to the forums...<br /><br />Take a look at the gasket between the float bowls and upper carb body. If they are black, you are long overdue for a carb over haul. <br /><br />Get a manual and carb kits. Also follow the instructions in the manual for sync and link...that is getting the spark and throttle advane in time.<br /><br />Keep us posted.....Thanks.

 

[Solittle]

Re: 70 Johnson idle /stalls

http://www.outboardrepairs.com/carburetors/