Johnson, J60PL4SN, 2002

by Virg Kardell
(Pilger, NE, USA)

Motor is running rough, it starts fine, runs OK up to about 1/2 speed if I increase speed at all the motor cuts out and looses speed (does not shut down). So in other words it bogs down, if I reduce speed it runs OK again (OK meaning not perfect but at least it does not cut out). I have replaced the fuel filter and spark plugs but not sure what else to try.