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  1. Sikboats

    Vibration at 2500-3000 rpm with drive off

    7.4 mpi , customer drove with no oil pres because of blown oil line. fixed line and told him It prob will not live. Went to lake and had vibration at 2500-3000... told him it was probaly main bearings which it was they were burt up. Replaced motor and still have vibration, motor mounts tight and...
  2. Sikboats

    water temp fluctuating

    Temp gauge fuctuating 500ho carbureted I have a late 90's 500 hp I did a water impeller on , cleared all hoses and oil cooler and have great flow out of exhaust. Problem is the temp gauge keeps going from 130 to 180. Replaced thermostat and insured that grounding gasket was at base, replaced...
  3. Sikboats

    Temp gauge fuctuating 500ho carbureted

    I have a late 90's 500 hp I did a water impeller on , cleared all hoses and oil cooler and have great flow out of exhaust. Problem is the temp gauge keeps going from 130 to 180. Replaced thermostat and insured that grounding gasket was at base, replaced temp sensor and used my heat gun an the...
  4. Sikboats

    high oil temp 496 ho

    Hi , Customer claims oil temp running real high in 2007 fountain lightning on starboard motor , say got up to 290 but says water temp 160? Any idea's?
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