Merc 25 2 stroke Prop

Discussion in 'Prop Shop' started by PG350, Mar 17, 2014.

  1. PG350

    PG350 I Love microskiff.com!

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    I have 1997, 2 stroke, 25hp, mercury, tiller that I got with a beat very beat up prop. The prop on the motor says 48 19640 A40 13p, then lower it says 9632x. Is this the stock prop that came with the motor? I want to purchase a new oem size prop. I am happy with the performance as is but think it is unbalanced. Any other suggestions??
     
  2. GSSF

    GSSF I love my microskiff

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    That is a stock merc prop for that lower unit by the numbers you gave.  Yes, likely came with the engine.

    I put cheap Solas stainless props on all my small outboards, and am running a 13 p solas on my merc 25 now.  I am very happy with the performance.
     

  3. PG350

    PG350 I Love microskiff.com!

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    Thank You for the info.
     
  4. Gramps

    Gramps Living & Dying in 3/4 Time

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    13p in aluminum should treat you well, might need to go down to a 12 or 11p in stainless.


    Like a broken record, I'm a huge fan of Turning Point props for performance and price point. :cool:
     
  5. PG350

    PG350 I Love microskiff.com!

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    I found a used stock mercury prop for 35.00. The prop paint is peeling but the metal is perfect, not even any dings. Hopefully this works out.

    I also found out my motor has plastic prop nut??
     
  6. HaMm3r

    HaMm3r Well-Known Member

    I like the plastic nuts better than the brass ones with the pin. It's as if the entire thing is the locking ring of a nylock nut. Never had one come loose.
     
  7. PG350

    PG350 I Love microskiff.com!

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    How tight should crank it down? Right now it is hand tight then one turn.
     
  8. HaMm3r

    HaMm3r Well-Known Member

    I honestly have never looked up what the actual torque specs are for it. I'm sure they're in the service manual, but I just crank it down until it's snug, then apply firm but not excessive pressure to the ratchet until it stops.
     
  9. PG350

    PG350 I Love microskiff.com!

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    Thanks, I could not find the specs in my manual but it should be fine.