Reply
 
Thread Tools Search this Thread
 
Old 27 June 2013, 16:47   #21
Member
 
Country: Canada
Town: GTA
Boat name: Zodiac
Make: Zodiac Futura MkIII
Length: 4m +
Engine: 50 HP ETec Tiller
Join Date: Aug 2010
Posts: 201
I think you guys are right. 33 34 is what I was expecting. At least I'm getting somewhere towards a resolution. Thanks!
__________________

__________________
Northern Pike is offline   Reply With Quote
Old 27 June 2013, 23:21   #22
Member
 
Country: Canada
Town: GTA
Boat name: Zodiac
Make: Zodiac Futura MkIII
Length: 4m +
Engine: 50 HP ETec Tiller
Join Date: Aug 2010
Posts: 201
Raised the motor one more hole. Gained about 200 rpm and about 1 mph, but also had about 200 lbs. less load in the boat. Required a little more attention to trim adjustment as it was a little more prone to ventilation.
__________________

__________________
Northern Pike is offline   Reply With Quote
Old 28 June 2013, 02:17   #23
Member
 
Country: Finland
Town: Helsinki
Boat name: SR 5.4
Make: Avon
Length: 4m +
Engine: Toh1 3,5 Yam 90/2S
Join Date: Oct 2009
Posts: 896
Firs impression is that You are running wrong size propeller, it has typical pitch /dia figures
for a 90 hp engine. But after checking the evinrude quick reference guide looks like the diameter is right, smallest available is 13. Strange though for such small HP.

Try to borrow a few other make/model of props and further play with the trim, height and weight distribution, that should do the job, it should go faster. Good luck!
__________________
fun on a boat is inversely proportional to size...sort of anyway
C-NUMB is offline   Reply With Quote
Old 12 July 2013, 16:12   #24
Member
 
Country: Canada
Town: Winnipeg
Make: Zodiac Futura Mark 3
Length: 4m +
Engine: 40Hp Yammy 4stroke
Join Date: Aug 2010
Posts: 7
Hey, how are you making out with this. I just got a used Mark 3 with a 40hp 4stroke yammy and it tops out at 47kph or 29mph without speed tubes. This is with a 15" pitch prop and some chop on the water.

We repaired a leak on one of the speed tubes and installed them. With the 2 of us and speed tubes we did 44kph. We raised the motor a couple of holes and now we're at 46kph. I need to get a tach to see where we are for rpm.
__________________
Luv2Fly is offline   Reply With Quote
Old 14 July 2013, 20:44   #25
Member
 
Country: Canada
Town: GTA
Boat name: Zodiac
Make: Zodiac Futura MkIII
Length: 4m +
Engine: 50 HP ETec Tiller
Join Date: Aug 2010
Posts: 201
I spoke to the dealer and the manufacturer. I now have a 4 blade 15 pitch prop. Haven't had the chance to try it yet though. Maybe tomorrow.
I don't think I'll be getting any more speed, maybe even less but so far it seems to be the next best choice of what's available from the OEM.
I suspect it will be a good prop for carrying a heavy load such as divers.
If I want speed looks like I'll have to aftermarket for a smaller diameter/higher pitch.
__________________
Northern Pike is offline   Reply With Quote
Old 14 July 2013, 23:20   #26
Member
 
cgoing's Avatar
 
Country: USA
Town: Connecticut
Make: Zodiac
Length: 6m +
Engine: Undecided
Join Date: Nov 2009
Posts: 572
Why a 4 blade prop? Was that what the dealer recommended? I am running a Suzuki two stroke 40hp on a MK 2 Futura and we are clearing 40 mph with an aluminum three blade.
__________________
Chris Going
DinghyPro
chris@dinghypro.net
www.DinghyPro.net
cgoing is offline   Reply With Quote
Old 19 July 2013, 00:48   #27
Member
 
Country: Canada
Town: Winnipeg
Make: Zodiac Futura Mark 3
Length: 4m +
Engine: 40Hp Yammy 4stroke
Join Date: Aug 2010
Posts: 7
I'm following your prop issue also as I would like to get more top end. Ideally I think I will move to a 60hp or ideally over power with a 70hp as yamaha's 70 has very little extra weight in comparison. The 50/60/70 all share the same motor but the 70 has better valving and has the torque'y gear ratio. I've done some calcs that I will share later. I thought the high torque gear ratios were only for heavy boats but the calcs show that it will make an inflatable go way faster. The 70 has you move up into their line of high pitch props that chuck the water way faster.
__________________

__________________
Luv2Fly is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 08:44.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.