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  1. apw30534

    ECU pinout/wiring diagrams ???

    I've got a 2007 VP 8.1 Gi-H in my boat. I also have a 8.1GXi ECU and harness from a similar year boat, sitting on my workbench. Both ECU's interchange with the boat harness, but the GXi ECU will only start and run the engine for a few seconds, then shuts down. I'd like to compare harness wire...
  2. apw30534

    Duoprop hub replacement ?

    Anyone done this yet ? Wondering how much of a job it is. I found a pretty nice set of props and only have $750 into them. Upon closer inspection it looks like the hubs are spun and/or walking around inside the props. I can buy a pair of hubs for around $300 but not sure how much of a pain its...
  3. apw30534

    2007 8.1 Gi converted to rear-mount closed cooling

    Ordered this kit from Hardin Marine last Fall and had to wait for my garage to be finished before tackling the project. Finally took care of it this past weekend. The kit was relatively simple to install, but due to my engine/hull combo... needed some extra fab work to make it fit/function...
  4. apw30534

    ECM Swap ? Plug and play ???

    Thinking about doing some upgrades/mods to my 2007 8.1 Gi-H... one of which (recommended by Larry Hofer at Raylar) is to swap out the 375hp Gi ECM for the 420hp GX-i ECM. I found a part number for the correct unit (3889007) but do not know for sure if it is a plug-n-play situation... or if it...
  5. apw30534

    Need suggestions for rear guides on a trailer...

    Launched the boat for the first time last week and it was a bit of a pain in the neck. Getting off the trailer wasnt a problem... but with the strong side current I had to make several attempts getting back on the trailer. Actually had the trailer too deep and overshot the bunks the first...
  6. apw30534

    Any tuners out there for Volvo Penta ECM's ???

    I have a 2007 VP 8.1Gi in a Chaparral 256SSX. I see Mercruiser tuners and tuning upgrade packages almost everywhere I look... but not a darn thing for Volvo Penta. Can I swap in a Mercruiser ECM ? or is there a company that sells a system to hack/tune the ECM ? (HPTuners)? What are my options...
  7. apw30534

    Towing a boat with 9ft beam...

    Wife and I are shopping for another boat. Looking at 2007-2009 Chaparral 256 and 276SSX's. The 256 is fine @ 102"... but we have found a couple 276's that are similar in price. Unfortunately the 276 has a 9ft beam and I have zero interest in dealing with permit hauling. Wife is wigged-out...
  8. apw30534

    Missing drive oil bottle ???

    Picked up this 92 Mariah 4.3/AlphaOne Gen2 last weekend and I'm going over everything, top to bottom. New exhaust manifolds, starter, Edelbrock carb, tuneup parts, gimble/bellows kit, water pump, etc... I just noticed that I havent been able to find the oil bottle for the drive unit. Am I...
  9. apw30534

    Adding 100+hp. Would you re-prop ?

    1997 Chaparral 2330 with a 250hp 5.7 Mercruiser and Bravo 3 with 3x3 26 pitch props. Boat is 3850lbs dry, hull is rated for 415hp. Current top speed on the boat is 48mph with 2 people + gear. I'm building a spare (355) engine that should be approx 365-375hp. Engine details: +.030" chevy 4 bolt...
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