gas/oil mixture?

[likearock]

i have a 91' 30hp johnson and it seems to foul plugs regularly. what is the proper fuel mixture for this engine? i had heard that johnson had some later 80's or early 90's that took the 100/1 ratio?<br /> thanks, likearock

 

[Dhadley]

Re: gas/oil mixture?

What plugs are you using? What fuel? What oil? What ratio? Extended idle? We need more info.

 

[likearock]

Re: gas/oil mixture?

the plugs are ql77jc4,the oil is johnson oil with premium gas. the idle is not extended 2 or 3 minutes atthe most.<br />thanks likearock

 

[Dhadley]

Re: gas/oil mixture?

You could use a hotter plug but I sure wouldn't reccommend it if you are going to use high test fuel.

 

[likearock]

Re: gas/oil mixture?

i forgot to mention in my previous post that the ratio i use is 50:1 but, it seems to load up on me after 2 or 3 minutes at idle. is johnson/evinrude a good brand of oil? <br />thanks, likearock

 

[Dhadley]

Re: gas/oil mixture?

One of the best. Are sure you are using 16 oz. to 6 gallons?

 

[likearock]

Re: gas/oil mixture?

hi,<br /> yes, i buy the oil by the gallon and use a small 8oz. measuring cup when mixing a tank. (two cups per tank)what else could it be?<br />likearock