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  1. M

    Sears 7.5 HP Crank seal?

    Re: Sears 7.5 HP Crank seal? Mine sure looks like a pressed in one piece seal. Looks a lot like this; How can I find out if the seal is leaking? I REALLY don't want to take it out of there if I don't have to. I'm not seeing a bunch of corrosion on the crank or the aluminum block around the...
  2. M

    Sears 7.5 HP Crank seal?

    Re: Sears 7.5 HP Crank seal? Well, La-dee-da - Went out to the shop, and the engine had majically separated from the leg! Here's what I saw The Searsparts site's parts list mentions a seal, a seal retainer, and a seal retainer ring. I got no idea how to get that seal out of there yet, because...
  3. M

    Sears 7.5 HP Crank seal?

    Oh, Tommy Two Stroke..... I got a bad, bad feelin' your guess was right about the whole crank seal thing. It's gonna be time to go cruising soon, so I'm starting to mess with this thing. It's Model # 217-588751, serial # 48 006884. My readings about pressure testing suggested this arrangement to...
  4. M

    20F toniight!!! Eeeeeeeeeeeekk!!!!!

    I pulled and drained the manifold and circ pump hoses, opened and rodded the block petcocks, starboard and port. I couldn't see how the powersteering/oil cooler was gonna lose the water, and as I am not willing to pull the engine to get the cooler plug, I pulled the hose from the port side of...
  5. M

    Boat sticking in gear

    I recently put this professionally rebuilt 454 in the boat, (Bravo 1). Replaced lower carrier, rear bearing, seals. We take it out to the river to do some final tesing, life is good. Couple of trips later, the stepkid says it's spraying sea water in the engine compartment. Water is leaking out...
  6. M

    Magic Disappearing 454 Balancer

    I got an oil leak, pooling small amounts in the valley of the Edlelbrock airgap rpm. The only places I can see that might do it are the intake bolts, if they penetrate the oil passages in the heads, or the distributor gasket. I snatched the dizzy , gasket looked dicey, so I made a better one...
  7. M

    Search feature sucks, crapweasel temp gauge

    this thing is killin' me. It gets one more shot tomorrow, then, I'm gonna hack it, and run my own wires. This infuriates me, because it's dirtbaggin'. DIRTBAGGIN'! Boat's goin' to the water tomorrow, and I'd rather go irritated and tasting the dirt of failure than without temp info. The wires...
  8. M

    Aww, Come ON - It's a friggin' temp Gauge

    WTF. There's only 3 terminals on the thang, for god's sakes. +Hot, Sender and ground? I never worked so hard for so long to do nothin' in my life. It'a a stupid ***** VDO temp gauge on a Merc 454. Originally had Medallion stuff. It wants a sender good for an Ohm range of 47.5 to about 450. I got...
  9. M

    Where does the fuel gauge get voltage?

    '88 Merc 7.4L, Bravo1, Webbcraft Velota. I can't stand these nonfunctional instruments, these things are not Christmas tree ornaments. Temp gauge is dead, got a replacement coming. Fuel gauge is dead, and apparently died before I did the engine replacement. I'm not seeing anything about how it's...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...
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