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  1. M

    1998 Johnson 6 hp choke removal

    Freind's motor, no manual, it's a J4BRECj. When I run it in the can, it slowly starts to lose RPM, and if I hit the throttle, it bogs and dies. It does this whether I use the onboard Tank, or a remote. If I yank the choke, and then shove it back in right quick, the R's wind right back up. I'd...
  2. M

    Failed 454 distributor stab

    I still got a dead engine. I used a mirror and a light to get a look at the timing mark on the balancer, and the timing pointer. I rigged a remote starter switch to the slave solenoid, so I'm able to bump the crank in really small increments. I put the balancer mark in the middle of the saw...
  3. M

    Got this weekend to evaluate used 09 454

    Rebuilt by a reputable local in Sept '09, maybe 20 hrs on it according to popular myth, Mk IV vintage 454, Isky MegaHydraulic cam, (#396271/281-14), Edlebrock Airgap intake, Holley, thru hull, Bravo 1. The PO was tired of pumping money into this particular hole in the water, and just wants out...
  4. M

    Gamefisher 7.5 screwy dying problem

    I got this motor 3 years ago on ebay out of Alabama. Model # 217-588751, serial # 48 006884. I've had a lot of fun with this stupid thing, but it hates going from fast to slow. It just dies, then it's hard to start. I recently put a red Atom Computer Ignition module on it. Ran great in the can...
  5. M

    Dimensional Drawings for 7.4L?

    I want to make an engine stand for a Mk IV 7.4L. This thing is running a Bravo 1, and I'd like to be a able to snatch the engine out of the boat, bolt it onto this stand, and work on it, or run it. I just need the dimensions between all the motor mounts. Any good place to get dimensioned tech...
  6. M

    Bravo 1 lower bearing carrier extraction

    I rigged a puller that'll put some real force on the carrier, but I'm worried that the carrier is stuck enough that I'm going to tear chunks out of the carrier's ring - the one in front of the retainer ring nut. I'm heating the torpedo with a radiant heater now, and it's been loaded with PB...
  7. M

    gotta replace 7.4 liter - 502?

    It's a GM Mk IV 7.4 Liter with a cracked block - A certain carburated GM 502 is going to appear here tomorrow. I have a week to evaluate it. The guy smashed the OMC King Kobra completely off the 502 boat. Two of his pals tied a-beam either side, and helped bail and towed him back - Water in the...
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