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  1. Lou C

    Mercruiser 4.3 cracked intake manifold

    Here are a couple of the older 4.3 pre-vortec intakes (1995 and earlier), I picked these up as spares because I'm in salt water but my orginal 1988 intake is still good believe it or not, just checked it again when I replace the 'stat. They tend to rust out right under the stat, if the engine is...
  2. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    https://www.holley.com/products/fuel_systems/carburetors/marine_carburetors/parts/0-80492 Here’s the carb I tried; as you can see it’s specifically calibrated for the 4.3 V6 engines. So what happened is I rebuilt the QJet and then took apart the Holley looking for a reason for the very rich...
  3. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    If you have good access it’s an easy job. Done it 2x on mine over the years.
  4. Lou C

    Mercruiser 4.3 cracked intake manifold

    I’m not sure of the reason but the intakes on the Vortec V6s are prone to cracking unless that square plug in the front of the intake is drained in addition to the normal engine drains. This is not the case on the older pre Vortec design in that it just drained when the engine was drained. I’d...
  5. Lou C

    Need help!!!! 4.3 mercruiser just clicking

    I’d remove all the spark plugs and disable the ignition and see if it will crank. Also see if any water comes out of the cyls. If so you have some work to do....
  6. Lou C

    Impeller housing overheating

    There are 2 trim relays (1 up & 1 down) and one assist relay. The up will have a blue wire on it, the down has a green wire on it and the assist will have a yellow/red wire. Depending on how the engine cover is designed water can drip back there from rain and cause corrosion...might as well...
  7. Lou C

    Impeller housing overheating

    PS also these OMCs use an assist solenoid between the ignition switch and the starter. On mine it is mounted with the trim relays (old style large relays). I had a similar problem about 12 or so years ago and it was corrosion on the terminals. Cleaned it all up and it was fine. So don’t forget...
  8. Lou C

    Impeller housing overheating

    Remove the spark plugs and check for water in the cyls. You want to make sure the non cranking issue is not hydrolock. Then take off the flame arrestor and pump the throttle while looking down the carb Venturi; do you see a good squirt of gas? If so lack of gas is not likely your problem. If...
  9. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    You’re welcome. Believe it or not this Holley calibrated for those V6 marine engines does not use a power valve. Yes I know it’s hard to believe but true; the main jets are bigger to compensate.
  10. Lou C

    restoration of 1991 VIP and engine upgrade inc conversion from spitfire ignition

    That they are right about. No parts available only used a few years. Actually better off with the previous breaker point system, I still have it on mine.
  11. Lou C

    Sea water pump impeller vanes flipped to the wrong way . . . ???

    Ted I was going to suggest that before I read what you typed lol. We are thinking alike! Anyway here’s my new 1st start of the year procedure to avoid a dry start. Put on muffs turn on water. Fill up a couple of one liter bottles with water + Dawn dish soap mixed in. Disconnect hose from...
  12. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    Coils rarely go bad but you never know. The Holley 4160 was specifically set up for the OMC & Volvo 4.3s, they used them from 1990 until the end of carb use. I must have gotten a bad one.
  13. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    I've had the opposite experience with QJet vs Holleys. I "though" my old Qjet was too old to rebuild properly, and "foolishly" replaced it with a brand new Holley that was calibrated for my V6 and the damn thing never ran right, made me waste a season friggin' round with it. Ran rich, surged...
  14. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    start with checking dwell, timing and idle speed then change fuel filters Q-Jets might need a rebuild I've done those too....
  15. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    Well if you ask on here, you will get mixed opinions on getting rid of points. Some like the Petronix system some have had repeated failures. I kept my points because I know how to set them up and no electronic mystery boxes to go wrong. If you have a Prestolite, they aren't hard to change...
  16. Lou C

    HELP! 1988 4.3 omc had water in the oil.

    The exhaust manifold having a crack, suggests that the past owner didn't drain it, and if one thing is cracked (as easy as those manifold drains are to get at) then other things are likely to be cracked. Personally I don't have the patience at all for fooling around with other people's old...
  17. Lou C

    Volvo Penta 3.0 I/O Overheating. Brand New Engine!

    You're welcome! If you need engine electrical stuff like starters or alternators I can recommend ARCO I have both on mine. Better than the off brand cheap stuff. If the battery is very weak and won't hold a charge, the charging rate in volts on the dash gauge will tend to be low. Check battery...
  18. Lou C

    can someone tell me what motors are in a 1987 28' Chris-Craft 283 Amerosport 262 ?

    The older V6s do take GM parts for all the internal mechanical parts but the front water pump will be a marine Chevy small block pump. If the engine uses open cooling (no heat exchanger) you have to use a marine pump with better quality parts inside, if you have a heat exchanger with antifreeze...
  19. Lou C

    Volvo Penta 3.0 I/O Overheating. Brand New Engine!

    PS Here’s a trick I use to make impellers last longer, by avoiding a dry start on the first start of the season. Hook up the muffs & turn on the water. Then go up on the engine and disconnect the hose from the impeller to the stat housing at the stat housing. Now fill that hose with water with a...
  20. Lou C

    Volvo Penta 3.0 I/O Overheating. Brand New Engine!

    That’s great to hear! I guess some impellers have to be installed that way. On my Cobra they have always been self-correcting. I also would lube with a bit of Dawn dish soap which maybe helps the blades flip the right way. Normally mine runs at 160, it might rise to 170-175 after coming off...
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