I bought a set of replacement spark plugs for a 96 Mariner 60hp 2 stroke . The ones I got were Champion QL87YC . The one I took out of the Mariner were NGK R BUZ8H . They are two different designs of plugs . The Champions are what I would expect to see in a car and are also 5mm longer than the NGK’s . The NGK plugs don’t have the curved ground piece at the end ( which the spark jumps across ) . Not sure I am explaining this too well but somebody may have an idea . I didn’t try the Champions as I was concerned that they were too long . Any idea what is recommended for this outboard ?.
I would stick with the NGK, The plugs that you had fitted (BUZ8H) are correct. I have looked at the Service bullitens for your engine and that plug now superseeds to part number BPZ8H-N-10 (NGK Part number)
Put in a set of NGK R BUZ8H . Made all the differance . Much easier to start from cold . The old set must have been worn although they didn't look it .
