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  1. jgrant911

    Another 4.3LX Vortec Upgrade

    So I'm doing going to be doing some work on my 180hp 1995 4.3LX Alpha drive this winter and though I would do the intake/head update while I'm at it. The drive number is 0F605187 and is a non-Vortec with the Weber 4bbl and Thunderbolt IV and a Closed Cooling system. I have been told, and have...
  2. jgrant911

    Preventative Maintenance on 20 Year Old Alpha One?

    My 1995 Maxum 1800SR has a 4.3LX Alpha One drive (#0F605187, 4bbl, non-Vortec, 180hp) which has performed flawlessly over my 20 years of ownership. The boat is only used in the summers, primarily for skiing, wakeboarding and cruising the lake. Even though it has spent 99% of its life in fresh...
  3. jgrant911

    Thunderbolt IV Timing Jump

    I recently noticed a rough/low idle on my 1995 4.3LX (Maxum 1800 SR). When I got home I did a tune-up (plugs, distributor cap and rotor) but when I checked the timing it was 4 degrees after TDC instead of 8 degrees before. Now, I am the only one who has worked on this engine and I have never...
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