Have an older liquid-cooled Lazer Z with 22 HP Kawasaki that I bought new years ago and has been an excellent machine until now. Early this spring the fan relay went bad and the engine overheated, but was caught before any major damage was done. (Dealer recommended bypassing the radiator thermal sensor switch last year so fan runs all the time when the motor is on). Replaced the relay and all was fine until this week when I noticed that sometimes the fan would not start when I started the engine. A restart would fix this...sometimes. Now the fan will not come on at all...checked the fan relay (OK), fuses (OK) and all wiring connections (OK)...but still no power to fan. Could it be a worn ignition switch? Ignition interlock safety module? Any other ideas? Thanks in advance for any advice with this problem.