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  1. Lou C

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    I think at this point it might be a good idea to pick up a Volvo workshop manual.
  2. Lou C

    1993 4.3 engine winterization

    You can do either, if you use the plastic ones just don't overtighten. The brass ones will last forever and if you use gasket sealer, I've never had any trouble getting them out with 100% salt water use. I've seen cases where the plastic one broke and caused a headache getting it out, so on my...
  3. Lou C

    470 Distributor Mechanical Advance

    If it’s like a Prestolite under the point plate there are a pair of flyweights that are retained by springs. When the engine speeds up the flyweights move outward due to centrifugal force and advance the position of the rotor which advances the timing. Then when it slows down the springs pull...
  4. Lou C

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    Lol. Just say NO to raw water cooling! I’ll run my old engine as long as I can but the next engine has to have a heat exchanger and remote oil filter mount!
  5. Lou C

    1993 4.3 engine winterization

    Gasket sealer works fine, you could even use marine grease, I like OMC/Evinrude gasket sealer, Merc Perfect seal is the same thing, I use it on all the bolts on the outdrive to prevent seizing because it seals water out of the threads. So even better than anti seize. A good substitute easier to...
  6. Lou C

    1995 OMC 5.0L Winterizing

    pic #2 & 3 is your raw water impeller, not the circ pump. With this, I'd mark and disconnect both hoses (don't mix them up) to let it drain, then hold up the hose that goes back to the transom (you show it in pic 2 & 4) and fill with AF with the outdrive down to push any residual water out the...
  7. Lou C

    1993 4.3 engine winterization

    That sounds good I’d replace the plugs though so the threads don’t rust over the winter. Put some gasket sealer on the threads.
  8. Lou C

    351 ford seaswirl cordova

    Yep agreed staying operational when you have old stuff is the name of the game.... Next thing will be a transom assembly. The original OMC stuff has held up surprisingly well after many years of mooring in salt water.
  9. Lou C

    351 ford seaswirl cordova

    It becomes an addiction, Scott!
  10. Lou C

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    No the vortec engines use the same exhaust, your old exhaust is what allowed water in the engine, corrosion around the sealing surfaces are the usual cause but the parts themselves can rust through and allow water right in a cylinder. In the USA there are a number of vendors for closed cooling...
  11. Lou C

    351 ford seaswirl cordova

    True true you would wind up having to go back to a Holley carb then, not the worst thing though, parts for those are everywhere....if it has a points distributor and Holley carb you are in good shape, the parts are available for those.. I've been buying up OMC spare parts from freshwater mid...
  12. Lou C

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    With what you want to do, I'd install a new 5.7 Vortec long block, and add closed cooling. The stroker idea is great for power but it adds significantly to cost if you are going to buy it all done. For the same $$ you can get the Vortec + a half closed cooling system and new exhaust which you...
  13. Lou C

    351 ford seaswirl cordova

    And, if that turns out to be true and you're considering buying it, pay attention to these points: does it shift easily into gear? if you get grinding even when you shift it properly (briskly not slowly) that suggests a stiff dragging shift cable or mis adjustment does it stay in gear or clunk...
  14. Lou C

    351 ford seaswirl cordova

    I see Seaswirl and Ford 351 in the same boat and I’m thinking OMC Cobra system because OMC owned Seaswirl and used 351s (5.8 liter) with the Cobra drive. Keep in mind the parts availability and service concerns with the Cobra system. I’ve had one for 18 years and had great luck with it but would...
  15. Lou C

    1999 Volvo penta 4.3 GLPWTR

    Lucky that you noticed that! So you have an older pre Vortec engine which is a bit less powerful that the Vortec design and takes the short reach plugs.
  16. Lou C

    Correct ventilation in engine compartment of runabout

  17. Lou C

    1995 OMC 5.0L Winterizing

    Ted you can write factory shop manuals when you decide to start your next career, lol! Great work!
  18. Lou C

    1995 OMC 5.0L Winterizing

    You can disconnect the feed hoses at the front of the manifolds; sometimes there’s a rubber cap on the rear of the manifold or a metal drain plug on the bottom end...
  19. Lou C

    Mercruiser 5.0 TKS vs 4.3 MPI

    yep they started converting over from carbs in the mid 90s, by '98 it was pretty widespread, first it was throttle body injection then they moved to full port injection just like vehicles did approx 10 years before that.
  20. Lou C

    1995 OMC 5.0L Winterizing

    Yes that is correct, remember you always properly drain to prevent freeze damage. Antifreeze is really just to reduce corrosion. And where you are, corrosion is probably a non-issue. Here we have to replace exhaust systems every 5-7 years. I bet you hardly ever if ever have to do that from what...
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