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  1. 1992 Polaris trail boss 350l running hot mystery PLEASE HELP!!!!

    ATV New Members
    My 1992 Polaris trail boss liquid cooled 350l is running hot after 15 min. Every time I ride it. * Water is churning from water pump nicely..... No air in system, *really, everything with the cooling system would apear to be in good working order.... *BUT.... * My cooling fan only comes on when...