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Author Topic:   Suzuki Propeller Nut

JDH posted 06-01-2001 12:38 PM ET (US)
Hi -
After a great run in Bay last night, I noticed that the prop nut on my Suzuki OB (DT-75) is loose. it is held in place by the 2 tabs from a locking washer, and a cotter pin further out the threaded shaft.
Is this normal, or can someone tell me what the torque spec is. I am new to powerboats, but have been a lifelong sailer, and am a good wrench.
TIA
Jim
JDH posted 06-05-2001 01:03 PM ET (US)
Back to the top...
Can anyone help?
lhg posted 06-05-2001 01:19 PM ET (US)
For engines 40hp and up, Mercury specifies 55 lbs ft torque on the prop nut. Others couldn't be too different.
Arch Autenreith posted 06-05-2001 01:34 PM ET (US)
I have my manual in front of me as I type.
I'm bored at the moment so here's what the manual says:
1. Apply a liberal coat of Special Lubricant 101 or Perefect Seal on propeller shaft splines.
2. Place thrust hub onto propeller shaft.
3. While aligning splines, place propeller onto propeller shaft.
4. Place propeller nut in tab washer groove.
5. Thread propeller nut onto propeller shaft.
6. After propeller nut is recessed onto tab washer, tighten nut securely (minimum 55 ft. lbs. torque).
7. Bend 3 of the tabs of tab washer down in grooves of propeller hub to secure propeller nut. (If tab washer tabs do not align with slots, continue to tighted propeller nut to obtain alignment. DO NOT loosen nut to align tabs.)
8. After first use, retighted propeller nut and again secure with tab washer. Propeller should be checked periodically for tightness, particlarly if stainless steel propellers are used.
I guess I need to note credit here somehow. Mariner/Mercury outboards Service Manual. 1991, Brunswick Corporation. No copywrite date.
JDH posted 06-05-2001 05:52 PM ET (US)
Thanks so much!

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Author	Topic: Suzuki Propeller Nut
JDH	posted 06-01-2001 12:38 PM ET (US) Hi - After a great run in Bay last night, I noticed that the prop nut on my Suzuki OB (DT-75) is loose. it is held in place by the 2 tabs from a locking washer, and a cotter pin further out the threaded shaft. Is this normal, or can someone tell me what the torque spec is. I am new to powerboats, but have been a lifelong sailer, and am a good wrench. TIA Jim
JDH	posted 06-05-2001 01:03 PM ET (US) Back to the top... Can anyone help?
lhg	posted 06-05-2001 01:19 PM ET (US) For engines 40hp and up, Mercury specifies 55 lbs ft torque on the prop nut. Others couldn't be too different.
Arch Autenreith	posted 06-05-2001 01:34 PM ET (US) I have my manual in front of me as I type. I'm bored at the moment so here's what the manual says: 1. Apply a liberal coat of Special Lubricant 101 or Perefect Seal on propeller shaft splines. 2. Place thrust hub onto propeller shaft. 3. While aligning splines, place propeller onto propeller shaft. 4. Place propeller nut in tab washer groove. 5. Thread propeller nut onto propeller shaft. 6. After propeller nut is recessed onto tab washer, tighten nut securely (minimum 55 ft. lbs. torque). 7. Bend 3 of the tabs of tab washer down in grooves of propeller hub to secure propeller nut. (If tab washer tabs do not align with slots, continue to tighted propeller nut to obtain alignment. DO NOT loosen nut to align tabs.) 8. After first use, retighted propeller nut and again secure with tab washer. Propeller should be checked periodically for tightness, particlarly if stainless steel propellers are used. I guess I need to note credit here somehow. Mariner/Mercury outboards Service Manual. 1991, Brunswick Corporation. No copywrite date.
JDH	posted 06-05-2001 05:52 PM ET (US) Thanks so much!