1974 jonnie 2 spark questions 9.9hp

[dolluper]

For trolling alot of fishing would a <br />C<br />Champion# UL81C be best or another plug<br />Converting this motor to 15hp carbs later on for mostly high speed on hydro what plugs would you suggest to start with Thanks guys

 

[muskrat]

Re: 1974 jonnie 2 spark questions 9.9hp

UL81C IS THE ONLY THE BOOK CALLS FOR..

 

[rabidfish]

Re: 1974 jonnie 2 spark questions 9.9hp

the suppercesion is to the L82C<br /><br />Or the L86C could be used. For higher RPMs used the L82C.

 

[dolluper]

Re: 1974 jonnie 2 spark questions 9.9hp

Whats colder than L82C ----[L80C is there such]

 

[Paul Moir]

Re: 1974 jonnie 2 spark questions 9.9hp

Next common plug I see is a L77JC4.<br /><br />Might be too cool though.

 

[rabidfish]

Re: 1974 jonnie 2 spark questions 9.9hp

L82C is probably good thru 7000 rpms... You going to run it harder than that you're gonna need more than plugs...

 

[fireman57]

Re: 1974 jonnie 2 spark questions 9.9hp

If you do a lot of low speed trolling you might gap the plugs a little wider. you won't notice it on the top end. Example: If they are supposed to be gapped at 30 set them at 40. Joe Reeves came up with this and for the last two years it has served me well.

 

[dolluper]

Re: 1974 jonnie 2 spark questions 9.9hp

Thanks guys I will be playing around with it till it's to it's peak of performance for sure The nephew will have a blast in the hydro that's complete now just setting the engine up next step the journey begins