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yanmar thermostat

  1. Yanmar 1GM10 Overheating

    I have a (1993?) Yanmar 1GM10 (single cylinder diesel) that gives an overheat alarm after about 10 minutes running at mid rpm. This has been a persistent problem and I've already done the following: 1) Flushed the cooling system with RydLyme (electrolyte descaler / cleaning flush - amazing...