1975 160 inline 6 TP Spark Plugs

[scott reierson]

I can't remember and I am not near this boat right now.

What surface gap spark plug do I need for my freshly rebuilt 1975 150Hp Merc inline 6 tower of power?

[Robby321]

Champ L76V or NGK equivalent. But I've stuck with the Champs as that what all my IL6s liked and ran fine.

[Glasstream15]

NGK BUHW runs great in my 1986 115 TOP. I run 40:1 QS Premium Plus and they WILL NOT foul trolling for an hour. Eliminates skeeters for 2 miles when I stomp it, but run great and get changed every 2 years just 'cause. Oh, and 6200 RPM all day long.

[FMP]

I have tried them both and fresh NGK BUHW are my choice, if you can increase the capacity of your ign. or change it to give more spark BUHW2 have a larger gap and produce a larger spark.

[Robby321]

NGK BUHW runs great in my 1986 115 TOP. I run 40:1 QS Premium Plus and they WILL NOT foul trolling for an hour. Eliminates skeeters for 2 miles when I stomp it, but run great and get changed every 2 years just 'cause. Oh, and 6200 RPM all day long.

Yep! Run good oil it mine at 40-1 too. And even as my crank up rebuild (Avatar) even after "fogging", and winter pickle and getting ready for water now I pulled the plugs and STILL CLEAN! Definite fan NGK as run them in all my other motors. But I've had no prob the champs in it.

[FMP]

Champ threads seem a bit sharper , maybe just my imagination but fresh NGK do seem a bit better.

[scott reierson]

What main jet size? I am fat now after break in. Can't remember what size I put in

[Robby321]

Whats fat in it now? .082's. .080's? As long as you get a good crisp launch, and no 'burrgiling" "Blating" ya good to go. If not drop down to .0785's. Check the plugs of course to see what they look like.