Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Gary Bowman, Msing48, mrdeath, Huizarr, guysgolf1
106531 Registered Users
Top Posters
TexDawg 87143
hopalong 78832
Pilothawk 75799
JDavis7873® 67386
John175 ® 65911
FattyMcButterpants 60793
Derek 🐝 59029
Tritonman 57766
LoneStarSon® 53822
SkeeterRonnie 53123
facebook
Forum Stats
106531 Members
61 Forums
864128 Topics
12279983 Posts

Max Online: 36273 @ 01/23/13 02:34 PM
Topic Options
#12439859 - 09/24/17 05:17 PM Four Blade Prop Question
Bob Landry Online   content
Extreme Angler

Registered: 08/10/11
Posts: 2679
Loc: Austin, Tx
My wife has a new Robalo R180 with a Yamaha 115. We use it primarily for knee boarding, tubing, etc. Most of the time when pulling I'm running around 3200-3400 RPM and the stern is really squatting and the bow pointed at the sun.
I know a four blade will cost me a little on the top end, but I seldom run WOT so speed is not a factor. The prop it came with gives 30MPH @5000 and that's what Yamaha says it should do with my boat.
Just wondering if a four blade would give the stern some lift at the slower speeds.
_________________________
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115

Bitter Gun Owner
Bitter Clinger
Armed Infidel

Top
#12439868 - 09/24/17 05:25 PM Re: Four Blade Prop Question [Re: Bob Landry]
Monkeypuncher Offline
Outdoorsman

Registered: 07/12/17
Posts: 77
Loc: Cedar Creek Lake
The four blade will allow the boat to plane faster and at a slower speed. I think it's just what you need.

Top
#12439870 - 09/24/17 05:26 PM Re: Four Blade Prop Question [Re: Bob Landry]
grout-scout Offline
TFF Celebrity

Registered: 12/08/08
Posts: 6409
Loc: Boerne, Texas
You might be better off with a 5 blade for maximum takeoff & lift.

Top
#12443424 - 09/26/17 08:50 PM Re: Four Blade Prop Question [Re: Bob Landry]
NCSkeeter Offline
Outdoorsman

Registered: 05/19/10
Posts: 58
Loc: Lake Gaston, NC & Holly Spring...
My Skeeter fish and ski with an F115 outboard had the same problem. I tried a cheap aluminum four blade Solas prop and it made a big difference. You may need to drop to a lower pitch to still achieve the same WOT RPMs. I think I dropped 2", but the 4 blade prop is cupped and the original 3 blade wasn't so it was really only like dropping 1". I actually didn't lose much, if any off of top speed.

Top
#12453672 - 10/05/17 12:11 AM Re: Four Blade Prop Question [Re: Bob Landry]
Curtbass Offline
Extreme Angler

Registered: 04/17/15
Posts: 1204
Loc: Grand Prairie, Tx
4 blade will have better stern lift.
_________________________
'98 Tr20 Triton
'94 Merc 200Xri
HydroDynamics 10" JP
Tempest Plus 25P-B&B @Steves Custom Props-Josh Edwards
HB999HDSI
HB899HDSI

92' ChampioN 201DCR Elite
13' Yamaha250SHO
HB Helix12 G2N
HB Helix10 G2N

Top
#12456403 - 10/07/17 07:13 AM Re: Four Blade Prop Question [Re: Bob Landry]
Muzzlebrake Online   content
Extreme Angler

Registered: 12/26/14
Posts: 1630
Loc: Euless
While my Tracker Avalanche with the EFI 150 Merc is not known to be a fast boat, the 4 blade 21P trophy plus I replaced the 3 blade 23P Tempest Plus with is beyond my expectations. 3 times faster hole shot and more top speed.
Thursday the lake was like glass and I finally got to open it up and trim it out WOT. GPS showed 63.1 mph with 2 people and 1/2 tank gas with full load of gear. 58 mph was all the 3 blade 23P Tempest would ever do.
I like the fact that I can now run on pad 10 mph slower and not porpoise. Cruising at 3800 rpm is saving me lots of fuel over having to run the motor at 4200 to stay on pad.
_________________________
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!


Top



© 1998-2017 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide