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  1. Texasmark

    Prop barrel slightly smaller than the gearcase

    Along those lines, I "think" I have seen high performance props where there is no "tunnel" for gasses to exit behind the prop. What I don't remember seeing is what the LU casting looks like right in front of the prop......I recall early low HP Mercury racing hydroplane short shaft engines that...
  2. Texasmark

    Prop problem

    Since they are made of "cast" aluminum, cast anything metal and surely some other materials oppose flexing. I agree with "airshot" and figure the percentage at a single digit value. On the other comment by Cyclops222.........Prove it!
  3. Texasmark

    How do you screw into fiberglass/gelcoat without chipping?

    Well that answers the question why I first saw them at work. A lot of sheet aluminum was processed......5052 T6 if I remember correctly after being retired 20 years.
  4. Texasmark

    How do you screw into fiberglass/gelcoat without chipping?

    I have done that and I think this is the type bit I was trying to describe above.
  5. Texasmark

    How do you screw into fiberglass/gelcoat without chipping?

    When in industry, people who worked certain substances used a peculiar bit. It may be referred to as a "sheet metal" bit. Rather than having a chisel point where the cutting edge starts at the center and as it penetrates the material the bit is slanted and works its way out to the final...
  6. Texasmark

    Better hole shot for a jon boat.

    Turning Point brand Hustler are high performance aluminum props and some are ported. The port decreases the density of the water flowing over the blades on the hole shot allowing the engine to rev up faster hence get on plane faster......like lowering the prop's pitch just for the hole shot...
  7. Texasmark

    Prop Swap opinions...

    The tab is fixed as is the prop. Neither move from the set position. I have run as close as 1/4" with no problems.
  8. Texasmark

    Boat performance

    In the Mercury manual covering larger engines it says that you should expect problems if compression is below 120 PSI. Don't know the specs on OMC and low HP engines but besides loosing one cylinder, you could be low on power. I don't see determining if you are operating on both cylinders is a...
  9. Texasmark

    LOWER END OIL CHANGE

    I never measured it but the sealing washers in rubber or fiber are compressed at time of installation. That compression easily acts as a "lock washer" to hold the screw in place.
  10. Texasmark

    Thrust Washer Question - Yamaha Performance 3 Prop

    Well back to the box of thrust washers. You can tell when you get a good fit.....taper on washer fits the taper on the prop shaft, nothing loose, no wobble, prop doesn't touch gear case.
  11. Texasmark

    Prop is making thumping / clicking noises when hand rotated (video)

    No!
  12. Texasmark

    LOWER END OIL CHANGE

    Just my opinion: OUCH! I have an impact driver and set of tips. Only time I used it was for backing out stubborn fasteners as the torque value from a hammer strike is undefined.
  13. Texasmark

    Prop is making thumping / clicking noises when hand rotated (video)

    If you knew about the action of the clutch dog previously, and now you are realizing a different noise, after an altercation, then by all means check it out.
  14. Texasmark

    Prop is making thumping / clicking noises when hand rotated (video)

    Ok how about engine and the remainder of the drive train since they are all linked together.
  15. Texasmark

    Scupper below water line?¿

    lemme guess: Drain for a bait well, or built in cooler, possibly a deck drain on center console boat. Surely don't want backwash filling them up.
  16. Texasmark

    Prop suggestion for 1995 60 hp Merc 2 cycle

    Did you also post this question on the Marine Engine/Mercury Mariner forum. If so, I answered it there.
  17. Texasmark

    Thrust Washer Question - Yamaha Performance 3 Prop

    Shouldn't be any play in the prop to prop shaft interface, and the thrust washer has to fit snugly in the rear of the prop and the ID is sloped to marry to the slope in the prop shaft to ensure exact alignment. I bought a used prop from a long time in business marine dealer. Upon attempting to...
  18. Texasmark

    Prop is making thumping / clicking noises when hand rotated (video)

    From the rear trying to turn the prop CCW results in resistance and the prop doesn't want to turn.....that is for F gear. Slowly turning the. prop CW and watching the prop in relation to the LU casting and listening, you will notice the prop moving away from the gear case slightly and then...
  19. Texasmark

    Scupper below water line?¿

    I had a Crestliner that had flappers on the splash well. Idea was to keep returning seas from coming in and filling the well when coming off plane, yet allow any water collected in the well to easily drain out. If yours are under water, I'd say that you are mighty stern heavy.....like some...
  20. Texasmark

    2004 Mercury 115 2 stroke - oil injection block off plate

    I think you "fixem for a living" based on your posts I have read over the years. I fix mine to suit me using my capabilities, experience and assets....max performance, minimum cost and hassle. If I were doing it for someone else, especially for compensation, methodology would be more akin to...
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