|
12 June 2010, 19:52
|
#1
|
Member
Country: UK - England
Town: Hythe
Boat name: BBQ
Make: Avon
Length: 4m +
Engine: Yam 40
MMSI: 235080184
Join Date: May 2010
Posts: 81
|
Auxiliary outboard
I was out Tuesday in the Thames estuary doing my RYA intermediate when the school boat had an engine problem. The alarm for low oil sounded and it reverted to low revs. We managed to limp home on the main at tick over without worry as the boat (7.5 picton rib with 200 yam) was fitted with a 4.5hp auxiliary.
This got me thinking if iwas out and about in mine and engine problems left me stranded would I really want to make "that" call.
Ok so I only have an SR4 but am thinking of some form of redundancy by way of a small auxiliary outboard or electrick outboard.
In relation to best option, fitting and space, size and power etc... What would your thoughts be.
Glenn
__________________
|
|
|
12 June 2010, 20:21
|
#2
|
Member
Country: UK - England
Boat name: The mystery machine
Make: zodiac pro 550 open
Length: 5m +
Engine: 90hp johnston
MMSI: 235074837
Join Date: Feb 2010
Posts: 24
|
Quote:
Originally Posted by Glenn collins
I was out Tuesday in the Thames estuary doing my RYA intermediate when the school boat had an engine problem. The alarm for low oil sounded and it reverted to low revs. We managed to limp home on the main at tick over without worry as the boat (7.5 picton rib with 200 yam) was fitted with a 4.5hp auxiliary.
This got me thinking if iwas out and about in mine and engine problems left me stranded would I really want to make "that" call.
Ok so I only have an SR4 but am thinking of some form of redundancy by way of a small auxiliary outboard or electrick outboard.
In relation to best option, fitting and space, size and power etc... What would your thoughts be.
Glenn
|
You will find that it is very hard to attach an aux engine and bracket onto a rib. We have the same problem, but thankfully where we go we have assistance from the sailing club safety boats, because my dad used to run them.
__________________
|
|
|
12 June 2010, 20:49
|
#3
|
Member
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,726
|
Quote:
Originally Posted by Adam Brimage
You will find that it is very hard to attach an aux engine and bracket onto a rib.
|
Eh?
Rather depends on the rib ... I always carried an aux on my Humber and will be doing the same on the Vipermax.
__________________
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...
Sent from my Computer, using a keyboard and mouse
|
|
|
12 June 2010, 21:27
|
#4
|
RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,070
|
Yep, I used to run an aux on my Sr4 as well.Straight on the transom.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?
Please click HERE and HERE and support our Trade Members.
Join up as a Trade member or Supporter HERE
|
|
|
13 June 2010, 08:34
|
#5
|
Member
Country: UK - England
Town: Hythe
Boat name: BBQ
Make: Avon
Length: 4m +
Engine: Yam 40
MMSI: 235080184
Join Date: May 2010
Posts: 81
|
Quote:
Originally Posted by Nos4r2
Yep, I used to run an aux on my Sr4 as well.Straight on the transom.
|
What was it, size n power and was there any space or balance issues.
G
__________________
|
|
|
13 June 2010, 08:47
|
#6
|
RIBnet supporter
Country: UK - England
Town: Rutland
Length: no boat
Join Date: May 2006
Posts: 2,500
|
I fitted a 4 hp to my SR4 put the bracket on the bottom of the A frame
And have a 15 hp on the Vipermax
__________________
|
|
|
13 June 2010, 10:16
|
#7
|
RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,070
|
Depends on your setup as to what'll fit straight onto an sr4. If you don't have an A-frame, you'll just about get an old 4hp Evinrude like this (but the shortshaft version) on there but make sure the prop can't hit the tubes. I put one on when I first got mine, but when I changed the main engine the 4hp no longer fitted in the gap between my engine and A-frame
The one I used more was an old 2hp Evinrude like this as it fitted easily. The single transom clamp screw made it easier to fit. Got 4 knots out of it flat out in flat calm.
No balance issues with either. They weigh very little. I suspect the balance was helped by my main engine being mounted centrally rather than offset to port, but with engines that small you can counter by moving the fuel tanks.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?
Please click HERE and HERE and support our Trade Members.
Join up as a Trade member or Supporter HERE
|
|
|
13 June 2010, 13:19
|
#8
|
Member
Country: UK - Scotland
Town: Edinburgh
Boat name: Sula / Mingulay
Make: Ribcraft 7.8/4m avon
Length: 7m +
Engine: 300 hp outboard
Join Date: Oct 2005
Posts: 79
|
ive got an sr4m - main engine is a 4 stroke honda but we have a 2 stroke 4 hp suzuki attached directly to the transom alongside it. pushes the boat along just fine if needed.
The honda has full steerage in both directions, the suzuki has limited movement in one direction, but you can always steer with the larger engine leg.
__________________
|
|
|
13 June 2010, 15:02
|
#9
|
Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
|
I have a 4hp Evinrude std shaft, like the one in Nos's pic, if anyone's interested in buying it. £175
__________________
|
|
|
13 June 2010, 15:30
|
#10
|
Member
Country: UK - England
Town: Hythe
Boat name: BBQ
Make: Avon
Length: 4m +
Engine: Yam 40
MMSI: 235080184
Join Date: May 2010
Posts: 81
|
Quote:
Originally Posted by Downhilldai
I have a 4hp Evinrude std shaft, like the one in Nos's pic, if anyone's interested in buying it. £175
|
Pm sent
__________________
|
|
|
14 June 2010, 11:47
|
#11
|
Member
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,671
|
Looks like we could have an "Evenrude Aux"parrty.....I had one of the 2Hps on the SR4, and have a longhsft 4 on the Humber.
Other nice lightweight one is the 3.5 Hp Tohatsu (also re- badged by pretty much much everyone else at some point in the last 20 years) 3 on Fleabay at the mo......
__________________
|
|
|
14 June 2010, 12:27
|
#12
|
Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,665
|
Quote:
Originally Posted by 9D280
Other nice lightweight one is the 3.5 Hp Tohatsu (also re- badged by pretty much much everyone else at some point in the last 20 years) 3 on Fleabay at the mo......
|
That's exactly what I had on my Zodiac Pro. Bit industrial - but does the job. Only went for the two-stroke because the 4-stroke is wider and heavier. One note of warning is that it needs addional support on the tilt bracket (and a ratchet strap to maintain tension on it) - as it frankly isn't up to the job bouncing up and down on the transom of a RIB! A Yamaha 4hp (2-stroke) would be a good buy too.
__________________
|
|
|
14 June 2010, 15:32
|
#13
|
Member
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,671
|
At least it's got a support bracket, which is a lot more than those Johnsorudes do........
One thing I don't miss form 1970s OMC - "friction tilt lock"
__________________
|
|
|
14 June 2010, 15:53
|
#14
|
RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,070
|
Quote:
Originally Posted by 9D280
At least it's got a support bracket, which is a lot more than those Johnsorudes do........
One thing I don't miss form 1970s OMC - "friction tilt lock"
|
Yep.
Bungee round A-frame is how I used to hold mine tilted
__________________
Need spares,consoles,consumables,hire,training or even a new boat?
Please click HERE and HERE and support our Trade Members.
Join up as a Trade member or Supporter HERE
|
|
|
15 June 2010, 08:40
|
#15
|
Member
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,671
|
...and in the absense of an A- frame you need about 4" of 2x1, an 8mm drill and some bungee.
Drill the wood , loop the bungee a copmlete lap of the leg just below the powerhead, then tie two figure 8 knots having tensioned the bungee and passed it throughthe two holes in the wood. For "run" you swivel the wood out the way (the fin halfway down the leg stops it getting to the prop). For "up" swivel it round & lift into the gap 'tween clamp & swivel. the corner on the swivel bracket holds it in place nicely. A further length of bungee tied to the clamp & looped round the leg holds the engine down onto the wood. (ensure that loop is short enough to not meet the prop when running, although not too difficult as the bungee stretches).
__________________
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|