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  1. 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...
  2. 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...
  3. 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...
  4. Lou C

    1992 Cobra Outdrive Trim Sensor

    Sorry boat's in the water for the season...
  5. 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
  6. 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...
  7. 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….
  8. Lou C

    Carb question

    Holley has a support forum on their website try asking over there…
  9. 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
  10. 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...
  11. 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.
  12. 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…
  13. 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/
  14. Lou C

    Dual battery shut off wiring

    Just to add to that, the only thing that should get battery power with the switch OFF is the bilge pump/auto bilge switch. This is particularly important for boats left in the water in slips or moorings. I used to have my auto bilge switch hooked up to the common terminal and had to leave one...
  15. Lou C

    Dual battery shut off wiring

    If you have the simple 1,2,1+2, & off switch you can alternate the use of batteries to make sure each one gets charged. I use #1 on odd days #2 on even days. With this system if you leave it on both yes it can cause one bad battery to drain the other. In this case I’d use both only if either...
  16. Lou C

    4.3 Carb v 4.3MPI

    Same thing with Volvo Penta.
  17. Lou C

    trailer manufacturer picks?

    Galvanized with spring axles. Don’t like torsion.
  18. Lou C

    4.3 Carb v 4.3MPI

    Just a caution: Both Merc & Volvo make parts for these throttle body & MPI systems go NLA after the boat is about 10 years old. With carbs this is not an issue. Just something to keep in mind if you buy older boats. I can get all the parts I need for a Quadrajet, that hasn’t been built since...
  19. Lou C

    Bought a new long block and wondering about the coupling and gimbal bearing.

    PS Great catch!
  20. Lou C

    Bought a new long block and wondering about the coupling and gimbal bearing.

    based on that you might not think so but I wonder how many amps the oil pressure safety switch is rated for? I have read of these switches being over loaded by the draw of the pump if a relay isn’t used…
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