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  1. M

    Alpha One - Replacing Shift Cable - Brass Bolt Stuck

    1997 Alpha One Gen 2. Really frustrating that I was sailing through the shift bellows replacement and the brass shift tube assembly that threads into the bellhousing is simply stuck. The 9/16 head brass is rounded and I have a feeling I'll be reverse drilling it, but I read a horror story here...
  2. M

    Prop Damage

    Anyone think this prop (images attached) is damaged enough to keep a 1997 Maxum 1750 at 3500rpm instead of 4400-4800 rpm at wide open throttle? I've been through and through the wide open throttle checklist and still can't get more than about 3500rpm. It is a 14.5 x 19 whereas the OEM prop was...
  3. M

    3.0LX Oil Pan Bolt Size / Thread

    Anyone know the oil pan bolt size/thread in a 3.0LX? I'd like to put a Fumoto valve for easier oil changes but would like to order one without pulling the bolt to measure... Any help is appreciated.
  4. M

    Last piece remaining - Merc 3.0 WOT Issue

    Ok. 1997 Merc 3.0. Only reaches about 3500rpm at WOT. Even has a prop that should be over revving the boat. I have been through everything in the WOT RPM list. New longblock. (old engine had sub 100 compression numbers) New fuel pump. Rebuild carb. Even tried a new one, same results...
  5. M

    EST Ignition Advance

    Troubleshooting a possible ignition problem. Using the jumpered EST timing procedure, I set the base timing to 1' BTDC, and then when removing the jumper, rather than going to the idle timing of 12'BTDC, it jumps to nearly 22'. I would think this is a problem with the module, but I tried...
  6. M

    WOT RPM Issue

    1997 Maxum 1750SR. New GM 3.0L. Rebuilt carb. New Fuel pump and fuel system test. New EST ignition set. Checked base timing (1' BTDC) multiple times. 14.5x19 prop (OEM was 13.75x21) Anyone who has kept up with my posts has noticed a trend... constantly chasing a WOT RPM issue. I've been...
  7. M

    97 3.0LX Carb Rebuild ?

    All diagrams I've seen, including the merc manual, as well as the rebuild kit instructions, show the float bowl assembly and throttle body as two pieces... My carb, 807504, seems to be one piece and lacks the screws noted for removal in the diagrams as seen in the attached picture. Anyone know...
  8. M

    Alpha I Gen II Leak around Upper/Lower Joint

    After replacing the impeller in my 97 Alpha I, I've noticed it dripping a bit of gear lube from the seams between the upper and lower unit. It also appears to be dripping from the small single hole on each side. At first I was thinking it was left over lube that had made its way out of the...
  9. M

    3.0 Exhaust Riser Leak

    When installing the new motor I had the manifold and riser off, and now that I've reinstalled, it seems to be seeping water around the riser to manifold joint. I replaced the gasket with a genuine merc part, no sealant per the manual, and torqued to spec. Anything I'm missing? The old motor...
  10. M

    Refilling Alpha I Gen II w/ Remote Resevoir

    I know the manual specifies filling from the bottom up with a pump; however, I'm curious as to how the remote resevoir works. I'm assuming the check ball in the drive keeps oil from flowing back into the resevoir. However, I would have also assumed adding oil to an empty resevoir with an...
  11. M

    Engine Coupler - Rubber Bumper

    Does anyone know the purpose of this particular item? #25 in the picture below: While transferring the coupler to my new engine I noticed this piece was missing as compared to the diagram. What purpose does this serve?
  12. M

    Mercruiser 3.0LX Rebuild

    As part of restoring my previously abused 97 Maxum 1750, I pulled the 3.0LX a couple of weeks ago and took it to a builder I've used in the past with my cars. Turns out he has experience with Mercruiser which is nice. Long story short, it's time for a rebuild. He's found a "hot" cam which I...
  13. M

    3.0LX Remove/Replace - Alignment Tool?

    I'm assuming that when the 3.0LX engine is removed and replaced, there's no getting around the necessity of the alignment tool. Anyone know if you can rent these things as it would be somewhat of a waste to purchase for a one time use... It's mentioned in the Merc manual as part 91-805475A1...
  14. M

    When it rains, it...

    Pours. Or rots your flooring. While I've been working through motor issues this off-season, I have a point where I'm waiting on some parts and decided to repair the "soft spot" in my floor. After pulling up the carpet, this is what I found. :eek: What's sad is that this is a 1997...
  15. M

    3.0LX Rebuild

    Background: Bought a 1997 Maxum 1750 w/ 3.0LX this summer. Boat always cranked extremely slow, went through a few starters, had problem with hot starts, and never would reach operating RPM at wide open throttle. A compression test showed even psi across cylinders, however, all were around...
  16. M

    Slow Start and Low RPMs

    I've been troubleshooting a low RPM at wide open throttle on my 3.0LX for quite a while and coming up empty handed. One thing I've realized at this point is how slow the engine turns over on crank, even with fully charged batteries and good wiring connections. I put a meter on it and saw 370...
  17. M

    Merc 3.0LX Compression Numbers

    3.0LX / Alpha One will not reach WOT RPM of 4500-4800. Only about 3000. Compression readings on all 4 cyilnders are within 2psi of each other, however, they all read approximately 100psi... right at the minimum listed in the Merc manual. Is this compression bad enough to be causing 1500 lost...
  18. M

    97 Merc 3.0LX Low RPM at WOT

    I just bought my first boat, a 1997 Maxum 1750SR with a 3.0LX / Alpha One. I've read that RPM at WOT should be 4400-4800rpm. However, I can't seem to get over 3000rpm and 30mph trimmed up. I should also mention that the boat lacks low end power, also. I know it's only a 4cyl, but it...
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