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  1. 3

    Bravo Bellows Replacement

    Hey folks, I have to change out the Bravo u-joint bellows on our 98 Monterey, due to a u-joint issue we had recently. The bellows is torn, and must be replaced. The drive is already removed, and I have installed the new u-joints and it is ready to back on. Can I simply remove the exhaust...
  2. 3

    Merc 4.3 Alignment

    Checking the engine alignment on a 2000 Merc 4.3 with an Alpha gen2 drive, in an 18 bowrider. The boat is in prestine condition, with what appears to be very low hours. [no meter] My alignment tool will only go into the coupler about 1/3 of the way, and it gets stuck. Tried rotating the engine...
  3. 3

    Bilge Pump Issue

    1998 Sea Ray 280: Hey folks, Both bilge pumps in the engine compartment have an issue. After testing them by putting water in the bilge with a garden hose, they both seem to function fine for about 7-8 seconds, but then stop working, as each of them trips its own breaker switch. The water...
  4. 3

    Carb Rebuild Kit

    Could someone please tell me the correct Sierra or Mallory carb rebuild kit part number, for a 1998 Mercruiser 5.7 2bl carb? The engine serial # is 0L019467. Thanks!
  5. 3

    Alpha Gen 2 Shifting Issue

    I recently installed two new 5.7 longblocks in a 1998 28' Sea Ray. [Both blocks had been frozen by the previous owner:facepalm:] Anyway, I am setting up the shift cables, and noticed that I only have about 2-1/4" of travel in the cable itself from the shifter. This boat uses separate throttle...
  6. 3

    Thunderbolt V Ignition Timing

    Trying to set the timing on a 1998 Merc 5.7 with a 2 barral carb. The serial # is 0L019480. I know I need to set it in base mode, [ground out the purple and white wire] however when I do that, I do not really see a change in the timing or RPM at idle. Should I? Also, this engine has a plastic...
  7. 3

    Exhaust Manifold / Riser Issue

    I just removed both sets of Barr exhaust manifolds and risers to inspect them, off of two 98 TBI merc 5.7 engines in our 32' Monterey. I found a small amount of water laying in the bottom of the exhaust ports, on all 4 manifolds. There was also some water in exhaust ports in some of the cylinder...
  8. 3

    4.3 Head Gasket Issue

    I'm in the process of replacing the Merc 4.3L engine out of a 1994 19' Sea Ray. The previous owner did not winterize properly, and you guessed it... a cracked block. I found a truck engine that seemed to be in good condition, and have swapped everything needed from the original engine. I...
  9. 3

    Should A Bravo 3 Clunk?

    I have a twin engine 98 Monterey, [new to me this past spring] with a pair of Bravo 3 outdrives. When shifting the starboard engine into forward or reverse, it shifts very smoothly with almost no noise at all. The port side however, has a loud clunk sound when it shifts into forward or reverse...
  10. 3

    No Start / Merc 1998 EFI 5.7

    Late in the day on Sunday, I had an issue with my port engine. It is a 98 5.7 Merc, throttle body EFI, serial # 0L067833. It would crank over ok, but it would not fire up. Previous to that, it was difficult to start sometimes, so all I did was open the throttle slightly, and it would start right...
  11. 3

    5.7 Merc Oil Pressure

    I think I have an oil pressure problem... It?s a 98 5.7 Merc EFI [throttle body] engine, with about 500 hours on it. It seems to run just fine, except for this problem. This boat is new to me, and I do not have any history on it. When the engine is cold, I have about 35-40 PSI showing on the...
  12. 3

    Bravo 3 Trim Issue?

    1998 Monterey, twin Bravo 3 drives. Trailer switch works fine, with both drives going up as they should. When trimming the drives down, each drive lowers with its own switch. [one at a time] However when trimming the drives back up, both drives go up at the same time using either the port or...
  13. 3

    Merc 5.7 Bearing Replacement

    Not sure if this has been asked before or not, but is it possible to replace both the crank and rod bearings in a 1998 Merc 5.7 by removing the oil pan, and then replacing them all, one at a time? The oil pan has never been off, so I would simply put a fresh set of stock bearings in. I had to...
  14. 3

    Sierra Continuity Kit

    Anyone know if there is a Sierra part number, for a Mercruiser continuity circuit kit 99940A2 ? Thanks!
  15. 3

    Mercruiser Engine Water Pump

    This past summer, I had to replace the engine water circulating pump [Merc part # 850399 1] on one of the two new Merc Bravo 357 engines I bought in the fall of 2009. It sounded like the engine had thrown a rod or something when it happened out on the water. Luckily the boat has two engines, so...
  16. 3

    Cylinder Head Torque

    I am in the process of trying to torque down all the cylinder head bolts, on a 98 Vortec 4.3 Chevy/Merc engine. The manual [#25] says to tighten all the bolts to 22 ft pounds, and then turn them an additional amount. [short bolts 55 degrees, medium ones 65 degrees, and the long ones 75 degrees]...
  17. 3

    Merc 4.3 No Spark

    I have just reassembled a 1990 Merc 4.3 V6 with a thunderbolt 4 ignition system, after an issue with a cracked block. I have the engine sitting on a skid, and am trying to fire it up, but she won't start. My battery and starter are just fine as the engine turns over as it should. I have put a...
  18. 3

    Merc 4.3 V6 / Balanced Shaft?

    Could someone please tell me how to determine if a 4.3 V6 engine has a balanced shaft or not? I am converting a 1991 chevy truck engine for marine use, [1990 Merc engine with a cracked block] and want to change the head gaskets to stainless. [As well as all the other required parts including an...
  19. 3

    Idiots with JB Weld

    Just removed the intake manifold on a friends 1990 Merc 4.3 V6 after finding water in the oil, and here is what I found. Some idiot [likely the previous owner] actually thought he could repair his cracked block with JB Weld.... :eek: Time for a new block.
  20. 3

    Lost Power And Won't Start

    I was out in a friends boat last night [1991 5.7 Mercruiser with an Alpha drive] and the engine suddenly quit. We were up on plane at about 3500 RPM, and had been for 10 minutes or so, and it just died suddenly. No prior warning at all. Other items on the boat such as the stereo, bulge pump...
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