Forum: WHALER
  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Whaler Performance
  1989 Revenge w/225 Yamaha Prop Article

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

Author Topic:   1989 Revenge w/225 Yamaha Prop Article
phatwhaler posted 04-04-2004 02:57 PM ET (US)   Profile for phatwhaler   Send Email to phatwhaler  
There's a article in the April issue of Motorboating detailing prop selection after repowering a 1989 22' Revenge with a 225 Yamaha. Article has some stats that some of you guys might find interesting.

phatwhaler out.

jimp posted 04-05-2004 05:07 PM ET (US)     Profile for jimp  Send Email to jimp     
I checked out the website and you can read/print the entire article. Very interesting.

I compared the results to repowering my 1990 Revenge 22 WT with a 2003 Merc 225 Optimax DFI last year. I was surprised that my DFI 2-stroke gets similar fuel efficiency compared to the Yamaha 4-stroke. At least that's what the numbers look like. I always thought the 4-stroke was about 10% better. As a side note, my old 1989 carbed 225 Johnson 2-stroke got 2 mpg at 24 knots.

In only one case did the 4-stroke beat the DFI (with 19" Black Max aluminum 3-blade). That was with the 4-stroke using a Ballistic 14-3/4 x 17 stainless: 32.7 mph at 4500 RPM and 3.85 mpg. My Opti runs at 31.9 mph at 3740 RPM and 3.62 mpg. The 4-stroke tied the DFI with the 4-stroke using a Rapture 14-1/4 x 21 stainless. In that case the 4-stroke runs 31.5 mph at 4000 RPM and 3.62 mpg. In all other cases, the DFI beat the 4-stroke.

The author of the Motorboating article concludes that it is very expensive to test a number of props (unless you can get loaners).

JimP

Lopaka posted 04-05-2004 06:33 PM ET (US)     Profile for Lopaka  Send Email to Lopaka     
I have a 1996 Johnson 225 carbed 2 stroke.....do you think Jimp's 2mpg at 24 kts for the 1989 version would be about the same for me?
caddis posted 04-05-2004 07:59 PM ET (US)     Profile for caddis  Send Email to caddis     
That's about what I average with my rebuilt 1982 Johnson 235, but at 28 mph or so. Pretty good estimate.

I need to check out that article.

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.