Adding four bladed prop to World Cat 266

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raduray
Posts: 39
Joined: Sun Jul 26, 2015 11:43 am
Boat Year: 2001
Boat Mfg: World Cat
Boat Model: 266 LC

Adding four bladed prop to World Cat 266

Postby raduray » Thu Feb 16, 2017 2:15 pm

My 2001 World Cat 266 LC had 13.25 x 15 three bladed props on the twin Honda 130's. Ride was bow high, even with the motors trimmed all the way down. I also could not cruise slowly in bad conditions as I came off plane in a bow high plowing attitude at speeds lower than 20 mph. So having read about four bladed props, last June I contacted Ken at Prop Gods who recommended Powertech RXB4 four bladed props, same 13.25" diameter with one less inch of pitch, making that 14. $750 plus shipping.

Props took 10 days to arrive. Installed them that afternoon and went out for a test ride.

First thing I notices was how much faster I came up on plane. Can't really quantify it as I never measured that aspect of performance with the old prop, but the improvement was significant.

Second thing is that the boat now rides level at speed. The bow stays down and I actually have to trim up the motors to get the bow up in chop.

Lastly, low speed performance is also significantly improved. The boat doesn't seem to come off plane in a nose high attitude. Rather, as I go slower and slower, it just settles lower in the water while staying level.

Top RPM is now 5600 instead of the 5800 I had before. Top speed dropped from 38 to 36.5 mph, which is fine. I like to cruise at 4000 RPM and 25 mph.

Overall I was ecstatic. I had expected minor incremental improvements at best, and instead I got myself a new boat.

Unfortunately, when I took the boat in for service in December I was looking at some significant $ to address problems with the Hondas. I decided I didn't want to put that kind of money into 16 year old motors, and repowered with Mercury 150 Four Strokes. I subsequently sold the RXB props to someone who has Honda 130's and I hope they serve him as well as they did me.
Last edited by raduray on Wed Apr 05, 2017 7:35 pm, edited 1 time in total.
2001 World Cat 266LC Leisure Cat w/Mercury 150 Four Strokes

SeaBiscuit
Posts: 275
Joined: Mon Apr 04, 2005 4:22 pm
Location: Destin, FL

Re: Adding four bladed prop to World Cat 266

Postby SeaBiscuit » Fri Feb 17, 2017 8:14 am

I wonder if anyone, with a 266 hull, has experimented with 4 blade props on the Yam 225's. I would like to see the comparison particularly if you could plane a a lower speed. All other factors, hole shot, handling, traction are fine, but, it would be great to stay on plane slower.
2008 270SF, 225 Yamaha's,Simrad NSS12-EVO2, 4G radar, B175M

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jeff6513
Posts: 213
Joined: Mon Dec 26, 2005 6:25 pm
Boat Year: 99
Boat Mfg: Worldcat
Boat Model: SC
Location: Little Egg Harbor,NJ

Re: Adding four bladed prop to World Cat 266

Postby jeff6513 » Thu Feb 23, 2017 6:48 am

I just received props from Ken,PowerTech - PTZ4 4bladed props(14-1/4 x 14)......I am in NE so cannot try them until I go in the water which will be soon as weather here is unusually mild for this time of year.
I have the yam f200 4 cylinders,and I was running the SWS props, big diameter 15-3/4 ...... it had good control overall....
4 blades will give you better hookup ,more bow lift and better control.
They also give you stern lift, and slower planing speeds.
I had 200 etecs before the Yams and ran the OFX4 4 blades.
Will have to see how these work out.

jeff
"Killin Time",.... 1999- 266 SC,Twin Yamaha F200 I4's)
Simrad AP/ Furuno 1870 /Furuno Radar

Airboat2001
Posts: 5
Joined: Sun Jul 17, 2016 1:57 pm
Boat Year: 2000
Boat Mfg: Worldcat
Boat Model: 246sf

Re: Adding four bladed prop to World Cat 266

Postby Airboat2001 » Sun Mar 19, 2017 2:09 pm

Do you still have the props.

Airboat2001
Posts: 5
Joined: Sun Jul 17, 2016 1:57 pm
Boat Year: 2000
Boat Mfg: Worldcat
Boat Model: 246sf

Re: Adding four bladed prop to World Cat 266

Postby Airboat2001 » Mon Mar 20, 2017 6:27 pm

Do you still have the props?

Airboat2001
Posts: 5
Joined: Sun Jul 17, 2016 1:57 pm
Boat Year: 2000
Boat Mfg: Worldcat
Boat Model: 246sf

Re: Adding four bladed prop to World Cat 266

Postby Airboat2001 » Sun Apr 09, 2017 6:47 pm

I bought these props from Radu. I have a 246sf with Honda 130's on it. I bought the boat with Honda 3 blade, 17 pitch props on them. The boat was not performing well. I was only getting 28 to 30 mph at WOT. Sometimes if the swale was deep enough the boat was having a hard time even pulling out of them.

This morning finally got some time to run the boat with the power tech RXB4 14 pitch props on. It blowed my mine how much these props changed the boat.
First of all when I first got on the throttle I could tell the boat was getting on plane in half the time.
Second the boat would stay on plane at 15 mph versus 21 mph.
Third the RPMS are now at 5650 instead of 5000
Fourth the WOT Is almost 35 mph.
Fifth the overall performance of the ride just seemed better.

I would like to thank RADU for posting the helpful post.

off gassing
Posts: 215
Joined: Mon Jan 31, 2005 2:02 pm
Boat Year: 2005
Boat Mfg: worldcat
Boat Model: 27 TE honda 225
Location: Biloxi ms

Re: Adding four bladed prop to World Cat 266

Postby off gassing » Mon Apr 10, 2017 5:00 am

Seabiscuit i put 4 blades on my 27 te with 225 hondas with the intention of improving my gas consumption at cruise. The 4 blades will give you quicker out the hole power and better efficiency at cruise. The only downfall you will lose a little off your top end speed. My neighbor is the local prop guy here on the MS gulf coast and has taught me lot about the different styles of prop, some provide bow lift while other provide stern lift. The main thing he has taught me is that most people tend to over prop boats thinking they will get more power and speed. Getting the proper rpms out of ur motors is the most important thing.

SeaBiscuit
Posts: 275
Joined: Mon Apr 04, 2005 4:22 pm
Location: Destin, FL

Re: Adding four bladed prop to World Cat 266

Postby SeaBiscuit » Tue Apr 11, 2017 7:23 am

nothing wrong with my rpm's, hole shot, top end. I've run the numbers on my prop slip and they are really good at 5% running WOT.
I would like to stay on plane at slower speeds which was the OP's finding with the 4 blade props. Ken at prop gods said it might be worth a try, but, followed up by saying working with catamarans had been hit and miss for him. I may give it a try just to see what the differences are. It costs about $100 for the experiment with him.
2008 270SF, 225 Yamaha's,Simrad NSS12-EVO2, 4G radar, B175M

raduray
Posts: 39
Joined: Sun Jul 26, 2015 11:43 am
Boat Year: 2001
Boat Mfg: World Cat
Boat Model: 266 LC

Re: Adding four bladed prop to World Cat 266

Postby raduray » Tue Apr 11, 2017 7:06 pm

I should update this post to state that my experience with the Merc's was similar to that with the Hondas. The Merc's were originally outfitted with three bladed props and performance was similar to that with the Hondas and three bladed props, bow high ride at slow speeds and came off plane at around 22 MPH. Switched to four blades (took two tries to get the right pitch) and the boat performance increased significantly, more level ride at low speeds and can stay on plane down to around 15 mph.

Being able to stay on plane at low speed was particularly important to me with the deck boat layout of the LC.
2001 World Cat 266LC Leisure Cat w/Mercury 150 Four Strokes

SeaBiscuit
Posts: 275
Joined: Mon Apr 04, 2005 4:22 pm
Location: Destin, FL

Re: Adding four bladed prop to World Cat 266

Postby SeaBiscuit » Tue Apr 11, 2017 8:40 pm

I will be giving it a try soon
2008 270SF, 225 Yamaha's,Simrad NSS12-EVO2, 4G radar, B175M


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