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  1. 2550SX

    Need advice choosing an engine.

    Hello, I have a 1992 Chaparral 2550XS with a base 330hp 454 with the peanut port heads. The engine has about 1400 hours on it and I can still get to 51mph on the GPS. According to the specs I can find online my boat weighs 5100lbs dry. I am considering pulling the engine to do some other...
  2. 2550SX

    Would a bad coupler make a noise like this?

    Hello all, I noticed this noise the other day coming from the coupler / gimbal bearing area of my boat. I hear the flappers ticking but there seems to be sort of a faint knocking also. The boat is a 1992 with 1400 hours on the original 7.4 / Bravo1 I see zerks on the coupler and I did give...
  3. 2550SX

    Buying a automotive engine to replace my mercruiser, need opinions

    I have an older 25' cuddy which has the original 330hp 454 from 1992. She still gets up and goes and seems to have decent compression with minimal oil consumption but I was considering pulling the motor this winter and stroking it to 496 and throwing some better heads on it than the current...
  4. 2550SX

    Winterizing question

    1992 Chaparral 454 with a Bravo 1. I bought the boat 3 years ago and the previous 2 years I would begin winterizing by remove the drain plugs from the block and manifolds. Once the water stopped dripping I would Install the drain plugs and pull the water inlet hose off of the thermostat housing...
  5. 2550SX

    Who on here knows how to tune a quadrajet?

    I have a 1992 Chaparral 2550sx with a 454. Serial OD717696 I I bought the boat a few years back knowing it had a Webber square-bore carburetor that had some warm start issues. I was surprised to see that the square-bore Webber was mounted on a spread-bore manifold. This is consistent with...
  6. 2550SX

    Where to pick up power for electric choke?

    1992 Chaparral 2550SX with the 7.4 and Bravo1 Engine SN: OD717696 I am removing a webber carburetor with a divorced choke and replacing it with a Rochester carburetor with an electric choke. Where do you guys like to pick up 12v to supply the choke? I think if I run a wire to the purple on...
  7. 2550SX

    Does motor oil go bad if left in the pan for more than a season?

    I was performing some maintenance on the boat I picked up last winter and I could not recall if the previous owner said he changed the engine oil prior to selling it to me. It looked clean but I thought better to change. It is a 1992 Mercruiser 454 OD717696 which I found out takes 7 quarts...
  8. 2550SX

    Which oil for fuel pump?

    Hello, I was doing a little maintainance on my 1992 Chaparral 2550SX with a 7.4 Mercruiser and I thought that I would also drain and refill the oil in my fuel pump. I could not find much information on the required oil. I have both sierra drive lube and 75w-90 gear oil in my garage. I am...
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