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Type: Posts; User: makomark

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  1. Re: Erratic High Idle 8.1 L MPI with 2007 ECM Engine s\n 670174 Manufactured 08/06

    I'd rule out vacuum leak as the idle speed is low (vacuum leak = more air = increased RPM).

    I'd suggest starting with the RINDA unit and use the STBD engine to get some baseline data...say lowest...
  2. Re: how do i find out if this 327 hp 1967 chriscraft motor turns left or right

    you can usually tell by looking at the bevel on the teeth of the ring gear...

    The bulletproof method is to remove the plugs and the rocker cover for number one. spin the crank one way and watch...
  3. Re: Oil Leak 1985 MCM 228 after stringers collapsed

    indeed, especially after 3+ decades.

    I would seriously consider a major overhaul when the engine is removed for repair...
  4. Re: 4JH5E with ZF HURTH HBW 250 transmission - Cant remove transmission from engine block

    think you are on the right path...I would suspect the input shaft is hung on the damper plate (or coupler) which is bolted to the flywheel.

    Typically, one removes the perimeter bolts attaching the...
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    Re: Rebuild Sherwood raw water pump

    That suggests your service intervals should be more frequent...hopefully, it will all go back together just fine...
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    Re: Rebuild Sherwood raw water pump

    if you have the new parts, you can usually make a good guess on where the old parts end...a hooked pick can also be useful for pulling some of those seals...if the seal is metal cased (around its...
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    Re: Steady Buzzer Sound

    ok...sounds like there is a short between the battery's positive loop and the ignition circuit...

    I would start by separating the large connector in the main engine wiring harness (connecting the...
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    Re: Steady Buzzer Sound

    If its the audio warning horn, then it sounds like the wiring in the dash has gotten loose (maybe).

    reconnect battery and then find the horn, if its going off - if its standard mercruiser stuff,...
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    Re: Rebuild Sherwood raw water pump

    if the snap ring (12) isn't there, the washer and the seal should come off the shaft...

    is the washer loose (axially)?tried lifting the washer with a 90 degree pick?
  10. Thread: Sparkplug Gap

    by makomark
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    Re: Sparkplug Gap

    I'd say go with the current NGK recommendation...if it doesn't perform as expected, you can always open up the gap a bit (if they are the old normal style - no platinum or iridium ends on the...
  11. Thread: Sparkplug Gap

    by makomark
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    138

    Re: Sparkplug Gap

    really depends on what the plugs are going into and if the ignition is 'stock'...
  12. Re: 4.3 mercruiser with alpha 1 gen 2. High RPM low power.

    I'd check the prop first...if the coupler was gone, I'd think you smell it in short order with that much slip...
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    Re: 5.7 reman mystery....

    Did the 'guilty' yard own up to the mistakes?? Agree to make the YC 'whole', in a finite period of time?
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    Re: flywheel needed

    you can get the GM performance gen V replacement for under $200...

    Moving the ring gear isn't hard, just need to take your time...any machine shop can do it for a small fee.

    The other option is...
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    Re: Replace drive plates?

    if you are referring to your damper plates (bolted to the flywheel), yes they wear out (and otherwise deteriorate). If yours are original you'd be crazy to not to replace them while the engines are...
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    Re: No start 2004 8.1 MPI Port Side

    I think I'd check the ignition and if the spark is present, then it suggests the injectors are not firing...

    After cranking it a few times, you should be able to smell the fuel in the throttle...
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    Re: Throttle Button question

    lots of different control boxes available in that timeframe....a clear focused picture of what you are asking about would help a lot.

    If its is the original control box, it may be easier to just...
  18. Re: Mercruiser 7.4 L Mpi L29 MISS FIRING in Bayliner 2855 Cierra

    The ecu doesn't control the fuel pump pressure, just the ON and OFF aspect.

    Fuel pressure gauge is a handy tool...

    may also be time to replace the pickup coil in the EST distributor...pretty...
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    Re: efi conversion

    Since you are in this deep, you may want to see if there is a custom tuner in your area...he should have several 'tunes' as well as the equipment to program the ECU...don't know about 'down under'...
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    Re: 5.0 mpi unsteady idle

    I'd bet the dash wiring has no impact on the idle instability on a MPI engine...I'd encourage your mate to start searching for another tech...
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