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  1. R

    Oil pressure

    I was the engine and take it off of the boat housing ..
  2. R

    Oil pressure

    on my god ! the boat engine top the wood/fiberglass around the engine ?
  3. R

    Oil pressure

    SO the engine oil is that engine oil drain plug ? also the engine oil draining the electric/hand pump oil stick port hole ?
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    Timing

    The timing idle around btdc 8 deg ....800 rpm ....the gasoline is around 89 octane . so the digital module ac Delco is the china crap ! the RPM 2500/3000 RPM 24-32 degrees .. the gun timing
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    Please help mercruiser 260

    did the engine head gasket ....
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    MerCruiser 5.0 will not start/run in idle mode (Carb Engine)

    WELL THE GASOLINE FUEL TANK/GAS FILTER/FUEL PUMP/CARB OFF TOP /BOWL/INSPECTED IT OF THE FLOAT ,,,THROTTLE BODY CLEANER OF THE CARB BOWL .. ALSO THE OUTDRIVE WATER PUMP 2-3 YRS AGO CHANGED IT !
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    engine just quits

    The fix of that MCM470 engine troubleshooting ? FIXED IT !
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    engine just quits

    MY BOAT MCM470 1978 ENGINE .... SO YOU WAS THE GASOLINE AND THE A FUEL FILTER/GAS PUMP/DID THE VENTING FUEL TANK TROIBLESHOOTING ..
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    engine water leak (NOT Transom or Stern drive)

    service manual
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    1979 3.0 140 mercruiser engine swap to 1988 3.0 engine

    WELL MY 1978 BOAT/MCM470 ENGINE DECADES DID THE REPAIRS . EXCELLANT ! THE boat is no rotted wood it ...20 ft Wellcraft .... did the wood / fiberglass coated it ... I was the gimbal inspect it every year .. did the grease and the outdrive .. gear oil draining it ..also the impeller around 3...
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    1979 3.0 140 mercruiser engine swap to 1988 3.0 engine

    I was the 1978 outdrive the picture 2023 my the outdrive MR 1978 ...
  12. R

    Bellows replacement

    THE AMAZON IS THE CHINA BELLOWS CRAPING ....NO CHINA BELLOWS ...
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    MR outdrive

    the nail alum of the pivot bolts https://www.nlamarine.com/products/mercruiser-gimbal-ring-bell-housing-hinge-pin-mr-pre-alpha-one-17-38031-1968-77?variant=1116233872
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    MR outdrive

    THE OUTDRIVE HINGE PINS 2 BOLTS ... STAINLESS STEEL ... THE PROPANE TORCH HEATING IT HOTTER BOLT THEN THE SOCKET IN THE ICE WATER ... THEN THE SOCKET COLD AND THE BOLT HOT AND THE A TORQUE ... THE BOLT IS A VERY HOT RED .... NO HAMMER .... THE THREADS ARE LOCKED UP THE CHEMICALS OF THOSE...
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    Voltmeter vs alt output

    THE VOLTMETER VOM ELECTRONIC TOOL .. VOLT 13.75 -14.75 VDC ...ON THE ALTERNATOR POSITIVE ... THE ALTERNATOR REGULATOR DIODES IS THE DAMAGED IT ..
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    Oil Analysis for high-hour 4.5L 250 HP

    THE ENGINE OIL SPEC IRON 80 PPM HIGHER LOU C ENGINE ..
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    Oil Analysis for high-hour 4.5L 250 HP

    the new engines oil 25-40wt ... years ago 30w 32-90 F ,,,, 40W 90F higher air temps .. I did the 30w oil engine MCM470 year 1978 MOLY 400PPM/ZINC 700 PPM / PHOS 750 PPM ..AIR TEMP 90F BELOW .... I was the FLAT TAPPETS additive zinc plus 4 oz. ..
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    Oil Analysis for high-hour 4.5L 250 HP

    Molybdenum is also utilized in various industrial applications. One of its significant uses is in engine lubrication, where it is added as a lubricant additive to enhance the performance of lubricants. Molybdenum compounds have excellent anti-wear properties and can reduce friction and protect...
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    Blown head gasket

    the engine block is the rusted it around the pistons rusted hole
  20. R

    Another prop slipping thread

    the outdrive bellows of the inside it full the water . u joints / bearings and did the bearing / shafts you was the gear oil in the fall ! the gear oil is the lower port hole ..did the gear oil inspected it ..
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