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Type: Posts; User: Bt Doctur

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  1. Re: 1992 mercruiser 4.3 Alpha one thunderbolt 4 system

    Hooked the antifreeze hose up to it

    So ,unless you drained everything first you used the "sure-crack" method?

    Timing is off is there is kickback, too advanced
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    Re: Prop not engaging

    Could be he prop hub if its rubber , a plastic flo-torq would just break. drive oil level?
  3. Re: For Antifreeze: Muffs OK or Directly Connect to Suction Side of Raw Water Pump ??

    Unless you drain everything FIRST, there is no way to insure your not diluting the AF with the water in the block or manifold. Remove the manifold plug on the bottom, probe and insure draining. Pull...
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    Re: Help! Drive water leak

    If its just above the inputshaft you may have a leaking bellow and the water is coming thru a vent hole
    Only other place is the trim wires but thats more of just a drip, not a stream.
    You say only...
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    Re: Mercruiser 120(2.5L in-line 4)

    that video is from a V8 with a HX ,totally different than a IL4 . He needs to pull the drive and start there.
    Test with a hose in the inlet port . Hell he might even find an old shutter or two ...
  6. Re: Overheating Mercruiser 350 inboard/outboard!

    Does anyone know what could have happened to #4 and is it something I would be able to fix myself from watching youtube videos? I am pretty handy but I have never taken an engine apart before....
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    Re: Mercruiser 120(2.5L in-line 4)

    put a newer riser on(holds acetone, passages are clear).

    Maybe the inlets are clear but what about the exits
    Like the other forum, check the flow on a funnel or remove the elbow for inspection...
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    Re: Engine alignment frustration! Help!

    And if you do it that way we will explain how to replace the stripped out coupler next
    If you omitted the doublewound spring , install it
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    Re: engine for boat help please

    that motor in a shed
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    Re: How best to handle water in gas

    buy a electric fuel pump from auto zone and pump the tank into containers you can see thru. Syphon off the good gas and leave the water
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    Re: Engine alignment frustration! Help!

    If the bottom of the mounts are smooth, you need the double wound spring, if new type mounts were installed (knurled bottom) you need a shim
    Have you tried adjusting the front mount ?
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    Re: Mercruiser Impeller Debris

    https://www.mercurymarine.com/en/us/parts-and-accessories/parts-catalog#epc::my_equipment

    plug you serial number in here
    Personally I would not trust that type of drain system No real way to...
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    Re: engine for boat help please

    you close to NJ
  14. Re: Mercruiser 5.0 MPI Missing Ignition Sensor plug

    If you have that flat cap make sure you do the wires correctly
    click to enlarge
    https://i.ibb.co/Fqnb19v/untitledabc.jpg
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    Re: Mercruiser Impeller Debris

    got an engine serial number, the check valve may be associated with the pressurized draining system
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    Re: Mercruiser Impeller Debris

    Port side is the cool fuel unit but know if no check valve on mercruisers
  17. Re: Mercruiser 5.0 MPI Missing Ignition Sensor plug

    you dont have one with that ign system. The mpi uses a dist called a HVS. (high voltsage switch)
    only needs the rotor to work
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    Re: 96 4.3 backfire at WOT

    cross firing, bad spark plug causing cross firing, bad intake valve seat, soft intake valve spring, broken intake valve spring
  19. Re: Overheating Mercruiser 350 inboard/outboard!

    There are a bunch of 25 footers with the 5.7 and a 14 x 19 prop running just fine.
    So you did not do a on water test so you have no idea if it even ever ran good. First a compression test , pull the...
  20. Thread: Drive id

    by Bt Doctur
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    Re: Drive id

    there is no impeller in the drive
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