85HP johnson spark plug?

[ceeyahd1]

I just bought a 71 starcraft jupiter with an 85HP johnson motor model V4AL-20A, the owner gave me some used spark plugs in case I needed then and they were L76V, I went to the auto part store to pickup some new plugs today and when I went to put them in I noticed the plugs in the motor are QL77JC4. What are the correct plugs for this motor?

Thanks in advance

[Daviet]

The L76V are surface gap plugs and are the orginal plugs for the engine. The QL77JC4 plug is a replacement with a center electrode, it will idle better with the QL plugs in it. Use the QL77JC4 plugs.