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  1. Scott06

    Exhaust leak from lower unit?

    As mentioned minerals from water get baked on as outdrive gets hot when running especially this part that is not under water on plane Completely normal use clr to remove if you care to. Any product that made to take mineral deposits off bathroom fixtures will work
  2. Scott06

    Solas stainless 4 blades all the same?

    Agreed I started with a pair of Michigan Vortex 4 Blades on my old boat (sea ray 170/3.0l) for more azz when towing skiers. Al was a good way to cut my teeth on prop swaps. My new boat I get bets holeshot with a Vensura but a lot of slip at WOT. The Revolution 4 I bought used on Ebay for $300...
  3. Scott06

    Solas stainless 4 blades all the same?

    I have both of these props and the nemesis is not a AL copy of a Revolution 4 no comparison between the two in performance... or cost. I was really disappointed with the nemesis/spitfire when i tried it insane amount of slip. Your point that it will likely be better than a black diamond is...
  4. Scott06

    Throttle spring on 1981 Mercruiser 120. Courting disaster

    what is with all the tape around the adjustment barrel nut? willing to bet that is part of the issue. def there should be no spring to hold it open....
  5. Scott06

    Another prop slipping thread

    You might benefit from Rhoda lifters very commonly used in us to tame wild camshafts by bleeding off duration at low Rpms
  6. Scott06

    Throttle spring on 1981 Mercruiser 120. Courting disaster

    post a picture of what you have. Some of the Mercs use throttle return springs in case the cable breaks but most do not. here is an example in a cut sheet of a 357 alpha. But it should close the throttle not open it To to mercruiser parts .com or marine engine .com and put your serial number...
  7. Scott06

    Another prop slipping thread

    Yes if you looked at the dog teeth they are back cut so under load from the prop it cant pop out of gear… and this is why they use the shift interrupt system. at least you have narrowed it down to the coupler. was the alignment ok when you took it off ? You don’t rally have to fully remove the...
  8. Scott06

    Antifreeze Question

    The cheaper AF i think does not have the corrosion inhibitors that the PG does have. like AD i also just drain, i do take off the supply hose from the outdrive and use a short piece of old radiator hose to dump a little af down each water jacket. I use about a gallon and figure any residual...
  9. Scott06

    What size bolt to hold cable anchor near manifold

    I would suspect it is 1/4” -20. A couple of ways to confirm look up your serial in a parts site like https://www.mercruiserparts.com/ bolt size is usually listed. measure the diameter of hole or stub of thread it will either be a 1/4”x20, 5/16” or 3/8” coarse thread
  10. Scott06

    Exhaust Manifold Question

    Thats a good price MM is about $1210 for barr manifolds, hardware/gaskets, and 3" risers plus shipping . If you are getting OEM delivered for $1400 you're in good shape.
  11. Scott06

    2000 Mercruiser 5.0 Thunderbolt 5 Ignition idle issue.

    this is most likely cause based on info given. When it dies look down carb and stab the throttle see if any gas squirts in would bet carb bowl is dry until next cranking and fuel pump gets power off the starter. Oil pressure switch is above oil filter has two wires on it - I think it is purple...
  12. Scott06

    why does my 1985 Mercruiser 140HP engine oil look like a coffee milk shake after overheat?

    Likely a head gasket due to the over heat do a compression or leakdown test. Could also be the joint between manifold and exhaust elbow but if this were leaking you would see water in combustion chambers after running. Outside chance the manifold got hot and cracked the water jacket.
  13. Scott06

    Exhaust Manifold Question

    I would look at Barr as they are generally considered to be comparable to OEM. GLM I think got hit or miss reviews here. Some comments on the sealing surface being not flat on them. You might look if you can upgrade to dry joints for added protection, at least if it leaks it won't leak into...
  14. Scott06

    1990 vs 1992 4.3 block swap

    Try a OEM merc impeller and housing. Its been a few years since I had a gen 1 but I found they last twice as long as the sierra ones. Not a huge data set but on both the gen one and gen two drives the OEM impellers last a very long time. Definitely the gen 2 design is better but I think you will...
  15. Scott06

    1990 vs 1992 4.3 block swap

    Whose impellers are you using ? Muffs can sometime be tough to get in a spot where it flows fully
  16. Scott06

    7.4 carb with Thunderbolt V - Cant get into base timing

    Only two things to check on throttle cable adjustment does it positively close the throttle against the speed screw, and does the throttle open wide …
  17. Scott06

    No Spark on 1988 4.3 ltr. engine

    From seeing his posts dont think english is his first language but seems to have worked on engines etc. and has some knowledge base. He is saying test the coil with an ohm meter before you replace it. You can find a bunch of you tubes on how to test primary and secondary side (thats what he...
  18. Scott06

    Am I just nuts???????

    Then may be worth doing it. I also collect old cars and love to work on my daily drivers ( which have a lot of miles). I might suggest and old tin starcraft vs trihull as they are relatively indestructible. Might be better channeled into older cars, like things that will be classics in 10...
  19. Scott06

    Am I just nuts???????

    Yes you are nuts I wouldn't invest the time in this boat. Unless you love it or have some sentimental attachment to it I cant see it be worth the effort.
  20. Scott06

    New boat with merc 5.7

    There is a man overboard switch on some models usually a red toggle switch on the shifter. It cuts ignition of when the key is in run and the switch is tripped. I think during start the ignition system is feed off the starter lug during cranking. On my boat if the MOB switch is tripped the...
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