Join the C34 Association Today!
[C34 Home] [C34Tech Notes] [C34 Tech Wiki] [Join!]
Please login or register.
Advanced search  

News:

Pages: [1]   Go Down

Author Topic: Prop Causing Engine To Smoke  (Read 1516 times)

0 Members and 1 Guest are viewing this topic.

Steve Sayian

  • Forum - Petty Officer 1st Class
  • *****
  • Karma: 3
  • Posts: 289
    • View Profile
Prop Causing Engine To Smoke
« on: June 24, 2008, 01:08:32 PM »

I have an M35B on a '99 MKII.  Last year I put on a Kiwi 16" feathering prop with a factory setting of 21 degrees (~11.5").  When the boat was launched the engine lost 600 RPMs and it smoked very bad.  I had a diver go in and reduce the pitch to 18 degrees (~10+").  Engine performance improved but there was still some light grey smoke at the top end.
This year I further reduced the pitch to 17 degrees (~9.5").  Engine RPMs increased a bit (my tach is not at all accurate so revs I achieved are not relevant.  Ordered a laser tach to rectify that problem) and it still smoked light grey smoke at the top end.

Prior to the Kiwi prop I was running the standard 15x9 3-blade Michgan prop and the engine didn't smoke a bit.  Could get 7.1 knots at full throttle.

My transmission is a 1.79:1

My questions are:  1. Does anyone else runnig a Kiwi on an M35B exibit any of these symptoms.
2.  What did your Kiwi props come set with for pitch in degrees?
3.  What diameter Kiwi are you running.

Thanks for the help.

Steve

 
Logged
Steve Sayian
"Ocean Rose"
1999 Mk II
Wing, Std Rig, Kiwi Prop
#1448, Hingham, Mass

Ron Hill

  • Forum - Master Chief Petty Officer of the Navy
  • ********
  • Karma: 65
  • Posts: 8051
    • View Profile
Re: Prop Causing Engine To Smoke
« Reply #1 on: June 24, 2008, 06:22:14 PM »

Steve : Catalina recommends that only a 15" diameter prop be used!!   :wink:
Logged
Ron, Apache #788

Mike Vaccaro

  • Forum - Petty Officer 2nd Class
  • ****
  • Karma: 2
  • Posts: 185
    • View Profile
Re: Prop Causing Engine To Smoke
« Reply #2 on: June 28, 2008, 08:56:50 AM »

We're running a 15 inch Kiwi on our M-25.  You're on the right track with the pitch, but you've got some extra area with 16 inch blades.  Provided blade clearance isn't an issue (Ron's correct about factory recommendation for 15 inch diameter).  The Kiwi dealer will likely swap blades with you, or you can continue to back off the pitch.

Best of luck,

Mike
Logged
1988 C34 Hull #563
Std Rig / Wing Keel

Steve Sayian

  • Forum - Petty Officer 1st Class
  • *****
  • Karma: 3
  • Posts: 289
    • View Profile
Re: Prop Causing Engine To Smoke
« Reply #3 on: June 29, 2008, 03:05:27 PM »

Mike,

I checked my paperwork from the company I bought the prop from and it does say 16".

Going to call them tomorrow and see about getting 15" blades.

Thanks to you and Ron for the feedback.

Steve
Logged
Steve Sayian
"Ocean Rose"
1999 Mk II
Wing, Std Rig, Kiwi Prop
#1448, Hingham, Mass
Pages: [1]   Go Up