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  1. Lou C

    One manifold hot (5.0)

    from the end of your last thread, that tube that connects the intake and exhaust manifold got me very curious so I did some snooping around.... https://www.mercruiserparts.com/bam/subassembly/31842/12834/90 https://www.mercruiserparts.com/bam/subassembly/31842/12834/160 OK you got me curious...
  2. Lou C

    One manifold hot (5.0)

    That, is very curious, you have a Vortec engine and there isn't supposed be an exhaust crossover in the intake like on the Pre-Vortec engines. I'm wondering just what is the purpose of that?!
  3. Lou C

    5.0gi to 5.7 swap

    You have 7/10s more displacement to feed so the ECM has to be calibrated differently. On the old days you changed carb jets & metering rods for the same reason
  4. Lou C

    Sealing compound for DP-SM / SX lower assy

    Evinrude gasket sealer Permatex Aviation I’ve used both in extensive salt water use…
  5. Lou C

    Kinda Clueless in South Jersey

    Might want to stay away from marinas & find a local auto machine shop that will do a marine build. They can evaluate your current engine and decide if it’s reparable or not. Some can build you a marine reman engine right in their shop. Might be better than long distance mail order where if...
  6. Lou C

    4.3 Carb v 4.3MPI

    Vapor lock is one problem I never had with the 4bbl Quadrajet but I’m also at sea level I have heard it’s more of a problem at high altitudes where the barometric pressure is lower…
  7. Lou C

    Volvo Penta 855932 Prestolite 7801A advance springs

    There you go nice find. I still have a pair of Blue Dot springs for my 1970 Ford 302 V8 from the '70s lol.
  8. Lou C

    1999 5.0L MerCruiser Exhaust Manifold Temperature Question

    One will always be a bit warmer than the other, for one thing the water flow to each side is never 100% equal and another it depends on how the boat sits on the trailer or in the water, if one side is lower that gets more water so it will run cooler. Mine sits lower on port side on the trailer...
  9. Lou C

    Volvo Penta 855932 Prestolite 7801A advance springs

    What you are going to have to do is search based on your engine/carb combination, so if its an AQ 271 I'm thinking it is a 5.7 with a 4bbl carb, correct? I don't have part numbers you're going to have to look for parts for similar engines (OMC or Mercruiser) that used the same Prestolite...
  10. Lou C

    Volvo Penta 855932 Prestolite 7801A advance springs

    Try marine engine.com, look up a similar OMC engine…. I have found a couple of spare Prestolite distributors for my old 4.3 V6 complete with the springs etc on eBay…. If you use aftermarket springs see if you can find a hot rod shop with a distributor machine (very old school) they may be able...
  11. Lou C

    1992 Cobra Outdrive Trim Sensor

    Sorry boat's in the water for the season...
  12. Lou C

    In dash GPS speedo?

    Disconnect the the tube from the pick up & bow it out with compressed air. That’s all I had to do and my boat sits in salt water 5/6 months each season
  13. Lou C

    Dual battery shut off wiring

    On most inboard engines the common simply goes to the large positive terminal on the starter solenoid & there is usually another wire that goes from that terminal up to the B+ terminal on the alternator. If yours is wired this way then no need to add additional wiring. That Cole-Hersee switch is...
  14. Lou C

    In dash GPS speedo?

    Maybe you could just replace the pick up for the pitot tube. I did that & cleaned out the hose for it and the Speedo follows my gps speed over 10 mph….
  15. Lou C

    Carb question

    Holley has a support forum on their website try asking over there…
  16. Lou C

    Trailer repair installed wrong disc actuator on 2 axle drum trailer

    https://www.tiedown.com/wp-content/uploads/pdf/c100.pdf Page # 5
  17. Lou C

    Trailer repair installed wrong disc actuator on 2 axle drum trailer

    Read the link to ChampionTrailers that I posted above. The residual pressure valve is inside the master cyl. To remove it you’re basically taking the whole thing apart. What you’re referring to is the orifice (opening) in the fitting that you connect to the brake line. This has to be larger in a...
  18. Lou C

    1992 Cobra Outdrive Trim Sensor

    Mine touches when the drive is about level, check to see if the arm has full travel. I’ve been using Sierra sending units & getting pretty good life out of them.
  19. Lou C

    Trailer repair installed wrong disc actuator on 2 axle drum trailer

    It’s not that they won’t work it’s that the response would be delayed and total braking force would be less than optimal. I don’t think the trailer companies would spend the extra $$ to design & build 2 different actuator master cyls for the same actuator if this wasn’t so…
  20. Lou C

    Trailer repair installed wrong disc actuator on 2 axle drum trailer

    Drum brake actuators use a check valve to maintain pressure in the wheel cylinders, so I'm not sure that a disc brake actuator (no check valve) will work with drum brakes. https://www.championtrailers.com/how-to-remove-a-residual-valve-from-a-master-cylinder/
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