Moderated Discussion Areas
  ContinuousWave: Whaler Performance
  4 blade prop on E-88

Post New Topic  Post Reply
search | FAQ | profile | register | author help

Author Topic:   4 blade prop on E-88
NoviceWhaler posted 07-29-2002 12:42 PM ET (US)   Profile for NoviceWhaler   Send Email to NoviceWhaler  
I'm in the market for a spare propellor for my 93 Evinrude 88SPL, and am wondering if anyone has tried any of the 4 blade props out there? What are the pro's and cons of 4 vs 3 blades?


Bigshot posted 07-29-2002 02:01 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Tried a 4 blade composite on mine and HATED it. But again that was a composite, stay away from them. I do not think you will get any benefit from a 4 blade on a light boat unless you are running it high on a jackplate. The 4's grip better but have more drag so you get a better holeshot but less top end. Montauks have good holeshots to begin with.
jimh posted 07-31-2002 10:27 AM ET (US)     Profile for jimh  Send Email to jimh     
In the mid-1930's the great French liner NORMANDIE was launched and put into service on the North Atlantic run, where she soon established herself as the fastest, most luxurious ship afloat. On her maiden runs she set new records for crossing times, being the first ship to average greater than 30-knots for the whole trip, but the passengers, particularly those in the stern of the ship, complained of vibration.

After the first season, the NORMANDIE was laid up and refitted. Additional bracing was welded into the stern of the ship and her propellers were changed from 3-blade to 4-blade. This had a very significant effect in reducing vibration.

Now you can draw a parallel from the NORMANDIE to your boat. She had four propellers and a shaft horsepower of around 160,000 HP. She was 1,029 feet long and displaced 82,799 tons. The propellers were 16-feet in diameter and weighed 23 tons each.

The naval architects decided that in order to couple an average of 40,000 HP per propeller it might be smoother if there were four blades instead of three.

You may experience this same benefit with your 88-HP outboard.

Post New Topic  Post Reply
Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.