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  1. Scott06

    Mercruiser 4.3 oil gauge mystery

    I think last time i bought a bosch gauge at the autoparts store it was like $25 https://shop.advanceautoparts.com/p/bosch-gauges-style-line-2-mechanical-oil-pressure-gauge-white-face-fst-8206/10717222-P fittings on the block are 1/8” NPT…
  2. Scott06

    Mercruiser 4.3 oil gauge mystery

    Exactly T it in by the sender and you can run it and see . Hot if you have 10 psi for every 1000 rpm you will be fine. to the OP did the oil get fuel contamination from running rich?
  3. Scott06

    Alpha 1 gen 1 water pump

    Would also recommend the oem parts as well. It’s been a few years, but last time I ran a Sierra impeller while it worked fine. When I changed it out, it seem to have a lot more wear on it than an OEM impeller of similar age. This is completely anecdotal, but it was my feeling that the sierra...
  4. Scott06

    Stalling and Starting problems

    If it is running with the key off there is a problem and someone may have futzed with the factory wiring. The pump gets power i think off the starter during cranking , then off the ignition circuit via an oil pressure switch during running. oil pressure switch is there to prevent pump from...
  5. Scott06

    Stalling and Starting problems

    With a fuel pressure gauge stabbed into the fuel line. im sure you can find some you tube videos of it. merc makes a fitting to put between fuel line and carb but its kind of expensive fitting. You can probably scab something together with 3/8 flare fittings and a t
  6. Scott06

    3.0 Long Block - Cracked - Any Value?

    When i repowered michigan motorz bought my old cracked long block from me. Would think someone who rebuilds marine engines like that might give you a couple bucks for the core
  7. Scott06

    Stalling and Starting problems

    Measure your fuel pressure should be no more than 6 psi. Make sure no power is getting to fuel pump when engine is off.
  8. Scott06

    Grooves worn in driveshaft

    Hard to see in those photos but they dont look damaged . If they all look like the last photo and holds pressure i wouldnt hesitate to use it
  9. Scott06

    rebuilt 3.0

    A lot of guys use shell rotella T4 15w-40. Has enough zinc for flat tappets. I have had good luck with it in my boat and older (60's) flat tappet cam cars
  10. Scott06

    Grooves worn in driveshaft

    Pressure test and rotate the driveshaft. If it passes I think you would be ok this year. What do the seals look like- torn dry and brittle? I think to do the seals on the upper you only big nut wrench to get the driveshaft out and a rolling torque wrench to do. Lower may be more involved...
  11. Scott06

    Towable tube repair

    I used this kit made by Airhead held up for years https://www.amazon.com/Kwik-Tek-AHRK-1-Vinyl-Repair-Kit/dp/B0000AY7XZ/ref=sr_1_2?crid=3ENOEYX82F9BF&keywords=airhead+inflatable+repair+kit&qid=1682081773&sprefix=airhead+inflateble+repair+kit+%2Caps%2C80&sr=8-2
  12. Scott06

    3.0 Mercruiser seems to hang or seize when starting

    Start with some basics - compression test- make sure a valve is not hanging up dump a little gas down the carb see if it coughs or runs a bit try rotating the distributor while cranking it to see if timing is off. Would agree with Scott - if its points ignition and has sat for 3 years, even...
  13. Scott06

    Grooves worn in driveshaft

    Thats where the seal rides in the upper, seal and dirt in it will cut a groove over time . Thats doesnt look too bad Would probably dress it up with an emery cloth and put it back in. For deep grooves you can put a speedi sleeve over it. some prop shops will repair these by spray welding the...
  14. Scott06

    Serial number

    Carbs like less than 6 psi (.4 bar to you ) so not much pressure
  15. Scott06

    Alpha 1 Gen 1 - Teardown - Need Advice

    I think the oring on the shaft tended to mess up the shaft seal when reassembling , so they dropped it
  16. Scott06

    OMC 460 backfire under load

    10 v is fine voltage drop is for the points life not the coil.if coil isnt getting mad hot don’t worry about it lowering float level can only lead to leaner fuel mxitures.
  17. Scott06

    Over heat issue

    Take the hose off the thermostat housing where the water comes up from the drive bet you have little to no incoming water flow. Get a impeller and kit with body (assuming you have a Alpha gen one drive) , OEM merc is best.
  18. Scott06

    Alpha 1 Gen 1 - Teardown - Need Advice

    you wont get through the season with those seals. If you do decide to press on check your lube frequently. To pop those lower seal out of the upper is an afternoon of work...
  19. Scott06

    Ford 302...closed cooling

    Thanks for confirming, given your answers we had suspected something in the gene pool for years...
  20. Scott06

    Ford 302...closed cooling

    You are setting your self up for a lot of jokes with this crowd....
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