Fuel/Oil Mix and Gap for '76(?) 20hp

[cjcocn]

Hello all<br /><br />First off, I checked the collection of posts on Johnsons to see if I could find some info, but was unsuccessful. So .....<br /><br />I seized up my 20 hp merc last week and am now using my old Johnson 20hp back-up outboard.<br /><br />I went to http://www.marinshopen.se/ and it seems that my Johnson outboard is a 1976.<br /><br />Can anyone verify this for me and let me know the proper fuel/oil mix ratio and the correct spark plug and gap?<br /><br />Model: 20BA76D<br />Serial: C 17508<br /><br />Thanks all.

 

[MCM]

Re: Fuel/Oil Mix and Gap for '76(?) 20hp

Hi, fuel/oil should be 50/1, seems to be pretty standard ratio, I think your spark gap is .040, not positive though.<br /><br />Mike

 

[JB]

Re: Fuel/Oil Mix and Gap for '76(?) 20hp

Gap your Champion plugs (don't have plug #)at .030", Chris. The .040" gap is for extended trolling or low speed operation.<br /><br />Yes, your engine is a 1976 20hp, and yes, it uses a 50:1 mix.<br /><br />Good luck.

 

[cjcocn]

Re: Fuel/Oil Mix and Gap for '76(?) 20hp

Great! <br /><br />Thanks fellas!