[walleyechaser]

I have a 90hp 1984 inline 6 Mariner outboardHow do you check the resistance in the stator and the trigger coil to insure they are ok when you have a spark plug not firing. I think i have a bad switch box but want to be sure. Can you replace one switch box at a time or only in pairs?Can you use switch boxes from Sierra along with mercury?What do the rev numbers mean on the switch box and are they compatible with older ones?Thanks

[Mod2]

Moving to Outboards.