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  1. #1
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    300 xs bolt torque specs

    Can I get the bolt torque and bolt tightening sequence for 300 xs heads and the front air plenum bolts.
    Is there a mercury diagram of the oil pump hoses to the correct brass fittings on the reed plate.

    would be much appreciated!
    Triad V21 #002 - 15in DBR 300 xs
    19' J-Craft - 175 Opti
    18' Pontoon - 115 CT 4S

  2. #2
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    Oct 2002
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    Yantis, TX
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    NOTE: This list is provided as a QUICK REFERENCE. A Factory Service Manual is your BEST guide for proper torque specifications.

    Air Compressor Mounting Bolts: 20 lbs/ft
    Air Compressor Head Bolts: 20 lbs/ft
    Air Compressor Pulley Screws (BLACK/STEEL Pulley): 170 lbs/in
    (INCH!!)

    Air Compressor Pulley Screws (BLUE aluminum/billet Pulley): 190 lbs/in
    (INCH!)
    Air Handler (Intake Plenum) Mounting Screws: 120 lbs/in
    Alternator (V-Belt Driven for EFI) Mounting or Adjuster Screws: 40 lbs/ft
    Cylinder Head Bolts- MOST 3L Models: 20 lbs/ft + 90 degrees (Replace bolts if removed)
    Engine Mounting Bolts to JACKPLATE: 90 lbs/ft
    Engine or Jackplate to FIBERGLASS HULL: 55 lbs/ft
    Fuel Rail Mounting Nuts: 35 lbs/ft
    Gearcase Mounting Nuts/Rear Bolt (3 Liter Models): 55 lbs/ft
    Idler Arm Spring Torque (Opti/Later EFI): APPROXIMATELY 75 lbs/in
    Idler Arm NUT: Torque to 35 lbs/ft (recommend red loctite on nut and/or stud).
    Powerhead Mounting Nuts: Varies (will post cheat pictures below, at later date)
    Propeller Nut Torque-
    835257K6 or 835257Q6 Flo-Torq with Conical Sleeve: 100 lbs/ft
    Prop Nut Torq: ALL other Hub Kits (including Racing/Fat Shaft): 55 lbs/ft
    Reed Box Mounting Bolts: 90 lbs/in (That's INCH POUNDS)
    Reed Petal Screws: Screw WITHOUT lockwasher: 12 lbs/in (INCH POUNDS) Use RED loctite
    Reed Petal Screws: Screw WITH lockwasher: 8 lbs/in (INCH POUNDS). Use blue loctite
    Steering Cylinder (Mercury, Teleflex and U-flex): Tiller Bolt: 20 lbs/ft
    Steering Cylinder (Mercury, Teleflex and U-flex): Larger thru-tube Nuts: 50 lbs/ft
    Steering Cylinder (Mercury, Teleflex and U-flex): Smaller Ram-End Nuts: 35 lbs/ft
    Spark Plugs: 20 lbs/ft
    Thermostat Covers: 100 lbs/in (INCH Pounds!)
    Tilt Tube (through transom brackets/swivel bracket): 45 lbs/ft (note- errors in manuals)
    Water Pump Retaining Screws: 60 lbs/in (INCH Pounds!)
    "We, the unwilling, led by the unknowing, are doing the impossible for the ungrateful. We have done so much, for so long, with so little, we are now qualified to do anything with nothing."

  3. Thanks V-bottom, jmatak9 thanked for this post

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