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  1. Scott06

    1989 Mercruiser 2.5L 120HP motor overheating trouble shooting

    If you ask this question of two people on there you will get three different answers. For me just drain, probe the drains to make sure there is no sediment blocking draining
  2. Scott06

    Mercruiser 4.3L won't start

    Agree looks weak and also seems like it is cranking slow. Wonder if battery is dead or corroded terminals are causing a voltage drop as it doesn't look like it is hitting spark often enough nor strong enough. I would measure volts when cranking at coil willing to bet is is low When I did my...
  3. Scott06

    Coil

    how far out from lightly seated is the mix screw? Normally should be in the 1.5-2.0 turns out range on a mercarb or rochester. when setting you can do it by ear or better yet use a vacuum gauge, turn it lean until it stumbles then go out until it stumbles rich. in between these two spots is...
  4. Scott06

    repowering 2006 Chaparral volvo 5.7 with stroker.

    the issue with reversion is different from riser height. riser height over the water line is one thing. reversion from a hotter cam and valve overlap is another. This can pull water in regardless of riser height. Danforth can walk you through it as you choose a cam. I'm paraphrasing- stock...
  5. Scott06

    Coil

    ok we got it it was the coil no need to post it 4 times... What is seen is typical of the chinesium replacement carbs about half of them work ok. Either the accelerator pump is not working or has a delay in action due to slop in the linkage or you need to take it apart and adjust needle and...
  6. Scott06

    Changing the U-Joint on an OMC Cobra Out Drive, OD

    That looks like a mixture of merc hi performance gear lube and water hence the milkyness. The lube is bluish green by color but the milk is evedince of moisture
  7. Scott06

    Mercruiser 4.3L won't start

    That looks like a stock mercruiser thunderbolt distributor. Are you getting spark if not go through the TB troubleshooting guide in the stickies
  8. Scott06

    Coil

    yeah got that it happens after an hour. maybe maybe not ...you have to look for what's missing (spark or fuel) when it acts up. everything else is conjecture.
  9. Scott06

    Coil

    this - when it quits then see if you are missing spark or fuel. If missing fuel open cap on fuel tank. If spark is no good start looking into points condenser etc if you get no psark off coil. Spark gap tester is really great to have in your tool box for times like this. Might also take a...
  10. Scott06

    going to buy a used mercruiser

    new the engine will have about 150 psi compression pressure so 140-145 on all cylinders indicates the pistons, rings and valves are in good shape. I would ask to see this my self don't just take the sellers word for it. Additionally you want to look at what the oil pressure is normal rule of...
  11. Scott06

    Redline 302 removal

    you may want to mark the slip yoke so it goes back together in same place on the chance that it was balanced together like a driveshaft
  12. Scott06

    Changing the U-Joint on an OMC Cobra Out Drive, OD

    Haven't done this on a cobra but have on a couple of alpha ones. With that much corrosion I would think you are also going to have to replace or put a speedi sleeve on the input yoke to drive as if the seal isnt leaking now it will shortly. If you are paying someone it will likely be cheaper...
  13. Scott06

    Removing transom bolts Gen 2

    Follow Bondos advice - penetrating oil like Kroil, heat and some paitence. yes of course it is a chance it can break or strip. If the aluminum thread gets messed up a helicoil or timesert thread insert can repair it
  14. Scott06

    Gen 2 water and oil hose

    The OEM hose for the water is 3/4 ID so in theory you can use heater hose but the oem hose is like $20, juice may not be worth the squeeze - #15 below https://www.marineengine.com/parts/mercruiser-sterndrive-parts/alpha-one-genii-1998-and-up/0l100040-up/bell-housing
  15. Scott06

    Volvo Penta 7.4 GL Slight Water in Oil

    you can use a cheap gauge like this stabbed into the intake/thermostat housing or a IR gun to see temp...
  16. Scott06

    Suggestions on LongBlock Supplier

    exactly pitting on walls, crank and rods surfaces , valve seats too. Have seen heads get trashed because the seats get so rusty it cheaper to buy new cores than stick inserts in them
  17. Scott06

    Suggestions on LongBlock Supplier

    Yes - when I bought a new base engine in 2015, the seller gave me $150 for my cracked (by previous owner) core... I'm sure they didn't try to repair the block , but I am sure the heads if passed magnafluxing would be inn someone's engine. Sure it can be done but I heard enough stories about...
  18. Scott06

    2006 Monterey Boat with a 4.3L Mercruiser TKS Engine S/N 0w354897 Mysterious Loss of Power

    yes it is possible but would test it out either my ohm testing the coil see if it is outside the range and use a spark gap tester. Only seen coils fail when the sensor in distributor leaks current so the coil is building up energy when there is no spark to be made... Also possible you have a...
  19. Scott06

    Automotive Diagnostic Tool

    I have had this scan tool for 5 years, works on all my toyotas. the mini cooper not so much BMW has their own protocol. https://www.amazon.com/gp/product/B07B4VC776/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
  20. Scott06

    Suggestions on LongBlock Supplier

    Looking at their website the $1993 he mentions is for a 4.3 to the OP make sure you click the selection button on the engine detail- it goes up to $2800 for a 2008-15 version
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