74 Evinrude 85 HP 4 cyl. Spark Plugs

[Steamboater]

I searched and could not find...What is the best spark plugs and what is the gap for this old klunker that keeps on rippin through our little lake. I have always just gotten champion and gapped it at 30-32?? Thank you

 

[scooke]

Re: 74 Evinrude 85 HP 4 cyl. Spark Plugs

hmmm, ive got a '70 85hp and I use Champion L-19v's, but my plugs are fixed, can't gap 'em. Sorry if that dosen't help any.

 

[rickdb1boat]

Re: 74 Evinrude 85 HP 4 cyl. Spark Plugs

QL77JC4 Champions, gapped at .030 are the recommended plugs for you motor, unless you run low speeds alot. Then I would open them up to .035-.040....Fixed gap plugs are fine for all out running all the time, otherwise stick with the gappable plugs for less fouling and better performance at all speeds.<br /><br /><br />BTW scooke <br />Same for yours, too.<br /><br /> OMC Plug Chart

 

[cheverad]

Re: 74 Evinrude 85 HP 4 cyl. Spark Plugs

In my cylmer manual it says to go with UL77V CHAMPION .

 

[rickdb1boat]

Re: 74 Evinrude 85 HP 4 cyl. Spark Plugs

A.A.C <br /><br />Clymer is wrong.UL77V is a surface gap plug. No adjustable gap on those... They Look like this type of plug:<br /><br />

 

[cheverad]

Re: 74 Evinrude 85 HP 4 cyl. Spark Plugs

Just checked it again ,you are right Rick and so is the manual,my mistake. there is no gap i looked just below.<br /><br />Sorry . <br /><br />P.S. I scanned the page but but don't know how to attach.