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  1. M

    OIl in the manifold valley?

    1988 454, Bravo 1, just dropped this recent rebuild in. Me and the stepkid took it to the drink yesterday, didn't burn down, ran well, but after 30 minutes or so, I'm seeing oil collecting in the pan that covers the lifter valley. The intake is an Edlebrock AirGap RPM, and I see that whoever...
  2. M

    Goin' to the ramp tomorrow- EEEK!

    I'm a nervous new parent. Got a used 1988 454 in this tub, got the Bravo 1 bearing carrier, new rear bearing, straightened prop shaft in. Transom assy's installed, got the engine aligned, outdrive's on, trim cylinders hooked up, bypassed the dead trim limit switch. Wired up the electric choke...
  3. M

    Up/out trim problems.

    1988 Merc 454, Bravo 1, got the trim pump running, but the up/out trim button doesn't work. Trailer button, (separate switch), does work. Down button does work. It's the same solenoid firing the pump motor, whether it's switched by the trim or trailer button, right? That suggests to me that the...
  4. M

    Any tricks for a colorblind electrician?

    It's a 1988 7.4L with a bravo 1. Just dropped a recently rebuilt power plant in that sucker, and now I'm trying to get all the wires hooked up, but I'm red/green/brown colorblind, so tan/blu looks like tan/pur, and gray looks like tan to me. I got the bilge pump, coil, trim pump, and blower to...
  5. M

    Merc 454 alignment

    I've finally got the freaking engine in this tub! It's a Mark IV 454 with a fat cam and some other fun stuff, in front of a Bravo 1, ser # OB8whatever. My problem is that I've never aligned one of these things before, and I don't like what I'm seeing. I grease up the end of the alignment tool...
  6. M

    Squirrelly Bravo 1 water pump

    Got the stepson's Mk IV 454 hangin' from a couple of fence stretchers, and supported underneath by the motor mounts. The PO had a vandal doing maintenance on this thing. I replaced the rubber/copper LP gas line with a coated steel brake line, replaced cracked distributor cap, relocated the...
  7. M

    Alpha vs Bravo 1 coupler

    I'm about to install a used MK IV 454 in my stepson's 23' WebbCraft Velota. He scarfed a donor boat with this thing in it, and the very first thing I see, as he's backin' under the hoist, is the coupler splines are skinny. His dead 330 hp 454 had a 3 bolt triangular plated coupler, the...
  8. M

    72 hrs to evaluate used 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...
  9. M

    7.5 HP Gamefisher dies, won't start

    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...
  10. M

    Bravo 1 scraping on transom Assy

    I've got the 7.4 liter MCM out of the boat, and while awaiting an engine, I'm sniffing around the transom assy, outdrive, etc., as I don't think anybody's been taking care of it. I see gear lube in the u-joint bellows, a radiused scraped area on the right side of the drive and bellhousing, and a...
  11. M

    502 for 7.4 liter swap?

    Got the cracked block Mk IV 7.4 liter out, (Bravo 1), looking for a replacement. Guy says he has a Gen VI 502 from in front of a King Cobra he'll sell. My set up is thru transom exhaust with Marine Stainless manifolds. Hoping I can keep those. Aside from needing an electric fuel pump pressure...
  12. M

    I'm 7.4 L shopping Help

    I have to replace a 1988 7.4 liter, and I've got the contact info for a guy that's supposed to have a recently rebuilt one for $1700 asking price. I have no idea what application it was built for, so how do I know if the cam is OK?
  13. M

    Which MCM 7.4 liters are OK??

    I gotta look into a replacement for a busted block. It's on a 1988 7 meter Velota from Webbcraft, the engine is a carbed 7.4L, Bravo 1, serial number tag not readable, block casting number HO13445. I think the serial number falls within the range of B771113 to D6031174, spanning model years '88...
  14. M

    Is this a gearlube monitor?

    Stepson's 1988 Merc - I don't see pics that look like this in the manual, but it looks like a duck, quacks like a duck therefore, I think it's a gearlube monitor. It makes me nervous that I don't see any lube in there. At the moment, I'm focused on other problems with that boat, but at some...
  15. M

    Can't get the chocolate mousse out!!??

    Pretty exasperated. This watery oil bilge in my 1988 MCM 7.4 L's oil pan is giving me fits. I've tried a plunger pump and two of those little drill driven rotary pumps. Nothing comes out, and the dipstick shows full. I want to spew profanity. I would not have thought a simple oil change would be...
  16. M

    Uh-Oh... Chocolate mousse for oil.........

    My stepson's 1988 mcm 7.4 liter, (ser# H013445), LH, marine Stainless manifolds and risers, raw water cooled, early Bravo 1, (ser# OB804538). This thing is in Maine, mostly in the brackish rivers. He went out into the open saltwater last season, it overheated, so he went to the nearest ramp...
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