1977 evinrude johnson v6 spark plugs idle surface gap

[capecoralbill]

I have a 200 hp Crossflow runs pretty good, but I wonder if i can get a better idle. I'm using UL77v, and I've tried QL 16v 's (no better, as matter of fact they're for sale on ebay item # 200020261427 ). Can I use QL77jc4 ? Actually I did try them for a few miles and it ran great, the engine sounded different, so i chickened out and put the old ul77v back in. I feared burning a hole in one of my pistons. anybody know if these QL77JC4 would be safe. I see where they are recommended in later years, but i think those are loopers not cross flows, if that makes a difference. Thanks in advance Bill

 

[capecoralbill]

Re: 1977 evinrude johnson v6 spark plugs idle surface gap

I have a 200 hp Crossflow runs pretty good, but I wonder if i can get a better idle. I'm using UL77v, and I've tried QL 16v 's (no better, as matter of fact they're for sale on ebay item # 200020261427 ). Can I use QL77jc4 ? Actually I did try them for a few miles and it ran great, the engine sounded different, so i chickened out and put the old ul77v back in. I feared burning a hole in one of my pistons. anybody know if these QL77JC4 would be safe. I see where they are recommended in later years, but i think those are loopers not cross flows, if that makes a difference. Thanks in advance Bill

 

[capecoralbill]

Re: 1977 evinrude johnson v6 spark plugs idle surface gap

The question is:............... Can I use QL77jc4 without damage? Thanks