Home > Spark Plugs
Most models use a single point 18 mm size plug with a short reach of the following type:
Less common or newer models use a single point 14 mm size plug of the following type:
QB (Curlew, Osprey, Kingfisher) 125 and 170 Models ONLY
Check to see which ignition assembly your outboard is equipped with. Each has its own setting. Adjust your spark plug gap as follows:
Older 102 models had a setting between 0.015 and 0.018. This was due to the fuel used at the time. With today's fuels, a setting of 0.020 can be used instead.