1967 3hp Johnson JHR-22C

[Inspirit]

I'm rebuilding this engine. The fuel mix is 50:1, does anyone have the correct spark plug specification and gap?

 

[Paul Moir]

Re: 1967 3hp Johnson JHR-22C

Welcome to iboats.<br />Ideally, you want to be using Champion J6C spark plugs, gapped at .030" (.76mm). <br /><br />PS - Although the manufacturer of your engine has always specified 50:1 for it, there's a knowlegable person here that suggest you should run that particulair engine a little richer at 40 or 32:1. <br /><br />I hope this helps!

 

[DJ]

Re: 1967 3hp Johnson JHR-22C

Inspirit,<br /><br />50:1 is fine.

 

[Chinewalker]

Re: 1967 3hp Johnson JHR-22C

If it were my 3hp, I'd run it a little richer than 50:1. That moor has bronze babbit bearings on most of the moving and rotating journals in the powerhead and as such will work better and last longer with a slightly richer oil mix. 40:1 will give you a good safety margin... Oil is cheap - motor partsare not.<br />- Scott

 

[parnold]

Re: 1967 3hp Johnson JHR-22C

can you do the same oil mix with a 6hp 1967?