tscannell737
Is it necessary or prudent to change the timing belt on a 25 kw Generac? I bought it new from northern tool in 2007. It has run approximately 450-500 hours under full load and has cycled every week since new. Is the water pump also needing replacement? My Generac Guy is telling me it’s overdue.


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Birken Vogt
Is this the Mitsubishi engine running 3600 RPM?

It is probably still OK, but considering the alternative is total engine destruction, it does have some years on it.
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78buckshot
That vintage 25kw probably has the Chinese Chery engine, I would certainly replace the belt and double check for wear/play in the crankshaft sprocket to crankshaft mating surface. If the belt lets loose while running at normal speed your going to spend a good chunk of change for head/valve/piston repair. I replaced a starter on one in January this year-bitter cold day, as soon as I tested the starter and the engine was just getting going-not even near running speed-the belt broke and sent plastic flying, I assume it also bent some valves.
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