Hi i have a four cylinder mercury 50 hp 1979 serial number 09371951 can anyone help with any sugestions how to check the switch box or stater to see which if these are at fault as sparking on the top 2 cylinders and no spark on the bottom 2 cylinders, any advice will be grateful
Hi i have a four cylinder mercury 50 hp 1979,can anybodey help with the size of the spark plug bore as i need to cut a new thread for the cylinder,i do not know what size tap to buy.When i removed number 0ne plug some of the thread come out and now i can not replace the spark plug,
Thank Reg
