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  1. Scott06

    Alpha 1 gen 1 4.3 merc prop size

    ok so the main prop worked right? 13 pitch is way low revs will go through the roof boat wont go very fast shooting from hip would think 17 or 19” pitch three blade.
  2. Scott06

    1987 19ft 4.3 merc prop size

    do-you have a prop on it currently? And if so what prop is it and what is WOT rpm? best is a relative term depending on how you use the boat. generally for basic all around performance you will have a 19” thre blade aluminum black max type When sitting on a dealers lot, maybe a 17” if its...
  3. Scott06

    2003 Ebbtide Mercruiser 3.0 engine rattle? Normal?

    Ok do you have it at the spark plugs? If you have it at the center cable you must be loosing it inside the distributor cap. Maybe connection between center post and rotor is gone
  4. Scott06

    Oil pump

    With cold oil yes it will peg at idle. Your drill at 1200 is turning the oil pump at same speed as 2400 engine rpm as cam timing chain is a 2:1 reduction. Hot idle will be around 15 -20 psi or so.
  5. Scott06

    Oil pump

    You are good to go then . Ive seen it take a while as well, especially if oil is cold and lifters are empty.
  6. Scott06

    Oil pump

    Agreed check the pan to pick up clearance.
  7. Scott06

    Rubbing compound for heavy oxidation

    After wet sanding it will be dull. Take a small area and compound it , it will be dull after cutting compound as well, shine will start to come out after polish, and really come out after finishing compound . every time i do this i do a small section start to finish to see how it comes out ...
  8. Scott06

    5.7 harness modification

    I think you are missing a jumper between the purple to supply fuel pump. It should get power off the starter during cranking , and also have a parallel supply off the purple that goes through oil pressure switch once it is running. Starter wire to fuel pump doesnt go through oil pressure switch...
  9. Scott06

    2.3l has 150psi across all cylinders, but small amount of water in oil.

    You can resurface the manifold to elbow selaing face either with a file or have a machine shop mill it or belt sander actually looks ok
  10. Scott06

    Alpha 1 gen 1 water hose

    Only ones ive seen are straight like you have https://nuwavemarine.com/mercruiser-transom-assembly/alpha-gen-1-transom-assembly-parts/alpha-gen-1-bellows-repair/oem-mercruiser-alpha-gen-1-r-mr-bellows-seal-repair-kit-30-803097t1/?gclid=EAIaIQobChMI5om_hLnp9QIVxgWICR3GBgQdEAQYBCABEgIO-_D_BwE
  11. Scott06

    Need a Winter Project.

    That’s too bad I wish I had bought more old iron in the 80 s when it was relatively cheap. I bought a 65 lemans coupe in 1987 that was prob like your moms … one owner 66 k miles never should have sold that car. After that all I wanted was a ‘real’ gto. I bought this convert that had...
  12. Scott06

    Need a Winter Project.

    Nice to see another poncho... I'm chipping away at my 65 GTO , just got Tri Power back on it , finishing interior. Hopefully top and another repaint in the next year or two. Really just enjoying driving it as I bought it in 1990, and has taken me 30 years to get this far. Just got it road worthy...
  13. Scott06

    Help a new guy out . Pcv valve

    is that a Merc engine serial number or GM block casting number? Doesn't show in parts searches. Usually on the flame arrestor cover there is tune up into but also as section with Merc engine, transom, and drive serial numbers. If it is the original merc block a serial number tag will be riveted...
  14. Scott06

    Help a new guy out . Pcv valve

    He just trying to piece it together... not get an earful If I recall the 4.3 2 bbl non vortec was 175 hp , vortec is 190 hp. Might need to pitch down depending on boat size.
  15. Scott06

    2003 Ebbtide Mercruiser 3.0 engine rattle? Normal?

    Yes check fir 12 v at plug in wire harness when key is on or cranking
  16. Scott06

    2003 Ebbtide Mercruiser 3.0 engine rattle? Normal?

    Take hi volt wire from coil off center post of distributor and hold close to clean ground on engine block, crank engine should see a good blue spark that can jump 3/8”/10 mm or so. If not spark here will need to diagnose distributor sensor and ignition module. if you have spark off coil, verify...
  17. Scott06

    Long term engine storage prep question

    As mentioned if you bag it you will be fine. I did a rebuild on a Pontiac 389 years ago. Sat for three years with just assembly lube in it . Added oil primed via distributor hole with priming tool/drill, broke in the cam…years later it still runs well.
  18. Scott06

    Help a new guy out . Pcv valve

    You are welcome this forum is good unless you start an oil thread… what is your engine number normally they are elbows only but maybe merc does something different ocassionally
  19. Scott06

    Just a final check on outdrive choice

    New alpha gen 2 drives $3200 US…https://www.michiganmotorz.com/mercruiser-alpha-one-gen-2-outdrive https://nuwavemarine.com/mercruiser-outdrives-parts/mercruiser-alpha-gen-2-outdrive-1992/alpha-gen-2-outdrives-lower-units/oem-mercruiser-alpha-1-gen-2-outdrive-1-47-1-62-1-81-2-00/ same two...
  20. Scott06

    Just a final check on outdrive choice

    I would go for a 1.47 drive in that rig. My Sea Ray 200 (21 ft ish) is listed as 3200 dry, has a 5.0/260 hp, with a 1.81 drive I can hit the rev limiter with a 21" 4 blade Revolution 4 prop and a couple adults. Your engine is a little more than stock too? If you ask about SEI drives you hear...
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