Reply
 
Thread Tools Search this Thread
 
Old 05 May 2010, 18:40   #1
Member
 
Country: UK - Scotland
Length: no boat
Join Date: Aug 2008
Posts: 45
Aux motors: the theory...

As can be seen in another thread, I am new to ribbing and currently seeking out my first 'starter' RIB. I have seen a few I am interested in, but what keeps niggling me is that they have no auxilliary engine. I seem to rarely see them on ribs?

I plan to use the boat I buy on the Atlantic coast of the Isle of Lewis, and while I will do the necessary RYA PB2 and VHF course...the thought of engine malfunction fills me with dread.

I just really wanted to hear what the thinking is on the subject. Is it: "buy a good engine and keep it maticulously maintained, and the chances of failure are slim"? I mean, I hear that well maintained 2 strokes are very reliable...but does age come into it?

One of the boats I am interested in is a Searider 5.4. Can you mount an aux. engine on this boat? There doesn't seem to be enough room on the transom. Also, the ubiquitous Yamaha Outboards these come with...are they reliable?

Any thoughts/advice/philosophys welcome. Thanks again.
__________________

__________________
ooglewoogle is offline   Reply With Quote
Old 05 May 2010, 19:15   #2
RIBnet admin team
 
Nos4r2's Avatar
 
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: 12,822
RIBase
Quote:
Originally Posted by ooglewoogle View Post

One of the boats I am interested in is a Searider 5.4. Can you mount an aux. engine on this boat? There doesn't seem to be enough room on the transom.
There is, just. I have a nearly identical Searider. I can just fit a 2.2hp Suzuki on the transom next to the main engine. It's very very slow but it'll give me steerage way (and I can use it for trolling a fishing lure )
Quote:
Originally Posted by ooglewoogle View Post
Also, the ubiquitous Yamaha Outboards these come with...are they reliable?
Hell yeah.Just keep them serviced and they last for a very long time.
__________________
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
Nos4r2 is offline   Reply With Quote
Old 05 May 2010, 19:30   #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: 3,709
I guess a lot of it depends on where you are - trundling around the Solent is fairly safe, being potentially 15 miles from the nearest vessel and 10 miles from the nearest human habitation, which is not at all difficult round these parts, means I wouldn't be without one. Having said that, I had mega paranoia about engine failure and the potential embarrassment of being towed home in the early days, but after a year or two of never missing a beat, I worried about it less, but I still wouldn't have gone far without the aux even though I only needed it once in four years (and that was user stupidity - casting off from a pontoon with the engine off and then flooding it by using choke on a hot engine)

Have a good engine, keep it maintained, and have an aux just in case because 4 knots is a hell of a lot faster than rowing or swimming, that is my philosophy
__________________
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
BogMonster is offline   Reply With Quote
Old 05 May 2010, 19:32   #4
Member
 
Country: UK - Scotland
Length: no boat
Join Date: Aug 2008
Posts: 45
Quote:
Originally Posted by BogMonster View Post
have an aux just in case because 4 knots is a hell of a lot faster than rowing or swimming, that is my philosophy
I *love* your philosophy!
__________________
ooglewoogle is offline   Reply With Quote
Old 05 May 2010, 19:33   #5
Member
 
Country: UK - Scotland
Length: no boat
Join Date: Aug 2008
Posts: 45
Quote:
Originally Posted by Nos4r2 View Post
There is, just. I have a nearly identical Searider. I can just fit a 2.2hp Suzuki on the transom next to the main engine. It's very very slow but it'll give me steerage way
Wow, that is great to know. Is there a pic of that on the site somewhere?

Thanks Nos!
__________________
ooglewoogle is offline   Reply With Quote
Old 06 May 2010, 02:43   #6
Member
 
Country: UK - England
Town: PORTSMOUTH
Make: Avon 5.4
Length: 5m +
Engine: Yamaha 60FE -
Join Date: Sep 2003
Posts: 1,870
Heres one - 2.0 hp johnson single cylinder
Attached Thumbnails
Click image for larger version

Name:	29809_10150158995255262_787870261_12127989_5618457_n.jpg
Views:	253
Size:	81.9 KB
ID:	50852  
__________________
------------------------------
http://www.ollysrib.741.com
ollyit is offline   Reply With Quote
Old 06 May 2010, 03:02   #7
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,650
Bearing in mind your base, I's be hanging an aux on my transom!

There are some older generation 4Hp twin cylinder machines that are quite slim. My transom is on a par with a searider one, and I can get one on there.

Other handy tip - get a long shaft - otherwise the prop will pop out the water at every wave!
__________________
9D280 is offline   Reply With Quote
Old 06 May 2010, 03:22   #8
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,009
ooglewoogle,

If I were in your location I would want an Aux (in fact even though I am not as remote as you I now have a very small Aux on a very small boat). I think the reasons Aux are not common on Ribs are:

1. There is a high density of RIBs on the South Coast, where Sea Start, the rescue services, and other boaters are all only a few minutes away.

2. Its tricky to fit one on and mount it in a robust manner - especially if you are into wave jumping.

3. There is a perception that RIBs are intrinsically safe, and to some extent they probably are a better place to be bobbing around waiting for a tow than on a boat with no permanent buoyancy.

The other thing I would do in your position is try to understand the common engine problems that occur at sea, and firstly try and avoid them with good maintenance and secondly know how to fix them to get you home. To my mind the two big problems are: (a) Fuel (b) Electrics.

For Fuel there are a number of silly things to be aware of - breathers closed/blocked, lines kinked, dodgy priming bulb etc. Then there are fuel filter blockages. I guess the turnover at your local garage won't be good to start with - so crap in fuel may be more likely as well as water in fuel. So a good fuel separator filter is probably important, along with a spare to swap at sea. You also want to know how to drain your carbs. I'd be tempted to keep a small tank of fresh good fuel in a separate can with its own hose and priming bulb on board in case your main tank gets contaminated, water in it etc. On the electrical front then you want to make sure you know how to start the engine with a dead battery. You also want to keep all your connections clean/dry. One possible area of trouble that seems to crop up is a short in the kill cord/stop circuit which will prevent you running the engine. Useful to know the symptoms and how to quickly disable this temporarily.

My own experience is that when you're at sea and it won't start you begin to panic a little bit. You need to be calm and logical and go through a set procedure. E.g. with me it is usually a kill cord not connected properly or that the engine is still in gear that means turning the key does not spring to life. If you are likely to get a bit flustered by it then a "check sheet" or trouble shooting flow chart (I think Haynes manuals used to have one for cars) would probably be a good call.

Now a 2 HP single aux isn't going to be much fun on SR5.4 in the sort of conditions you might face, and you may not be able to make progress against a strong tide but it would let you limp along whilst either waiting for a tow or trying to go debug the problem yourself.
__________________
Poly is offline   Reply With Quote
Old 06 May 2010, 04:15   #9
Member
 
Country: UK - England
Town: PORTSMOUTH
Make: Avon 5.4
Length: 5m +
Engine: Yamaha 60FE -
Join Date: Sep 2003
Posts: 1,870
Here it is in action, it does make headway, steering is a nightmare to keep it in a stright line if you have an a frame fouling it, an transom outboard bracket would resolve this, either way, it'd get you home eventually

[YOUTUBE]<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/hqQtj9rO_cc&hl=en_GB&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/hqQtj9rO_cc&hl=en_GB&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>[/YOUTUBE]
__________________
ollyit is offline   Reply With Quote
Old 06 May 2010, 04:32   #10
Member
 
Country: UK - England
Town: Near Godalming
Boat name: AJA
Make: Ribeye
Length: 6m +
Engine: Yamaha F150AETX
Join Date: May 2009
Posts: 558
Quote:
Originally Posted by BogMonster View Post
I guess a lot of it depends on where you are - trundling around the Solent is fairly safe, being potentially 15 miles from the nearest vessel and 10 miles from the nearest human habitation, which is not at all difficult round these parts, means I wouldn't be without one.
This would be my thinking. I don't have an aux - but I never leave the Solent.
__________________
neilda is offline   Reply With Quote
Old 06 May 2010, 06:14   #11
RIBnet supporter
 
Brian's Avatar
 
Country: UK - Isle of Man
Town: Peel, IOM
Length: no boat
Join Date: Nov 2000
Posts: 2,416
RIBase
ooglewoogle,

Just a thought............I know you are in a "remote" area, but........you should/must have a VHF radio.
You can always summon assistance although I appreciate your possible "reluctance" to do so.
In addition, despite "all" my travels, I have rarely been out of sight of at least one other vessel, and that includes the north of Scotland and all its islands.
__________________
Brian is offline   Reply With Quote
Old 06 May 2010, 06:21   #12
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: 3,709
Quote:
Originally Posted by Brian View Post
In addition, despite "all" my travels, I have rarely been out of sight of at least one other vessel, and that includes the north of Scotland and all its islands.
Whether or not said vessels are listening on the radio may be another matter, at least if the ones here are anything to go by. It may be a requirement but it doesn't always happen!
__________________
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
BogMonster is offline   Reply With Quote
Old 06 May 2010, 06:36   #13
RIBnet supporter
 
Brian's Avatar
 
Country: UK - Isle of Man
Town: Peel, IOM
Length: no boat
Join Date: Nov 2000
Posts: 2,416
RIBase
Oh sure Stephen. Just trying to put ooglewoogles mind at rest.
He may think "Oops, next stop Canada".

In your case thats probably true!!
__________________
Brian is offline   Reply With Quote
Old 06 May 2010, 07:06   #14
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,009
Quote:
Originally Posted by Brian View Post
In addition, despite "all" my travels, I have rarely been out of sight of at least one other vessel, and that includes the north of Scotland and all its islands.
Brian - I'm surprised at that. I've frequently been out of sight of other vessels and I'm nowhere near as remote as Ooglewoogle is proposing. Perhaps having a very small boat I tend to hide away in places where bigger craft don't go? In the area he is talking about a lifeboat could take an hour to arrive and that assumes he is able to reach the CG via VHF which may not be great in really remote places. The number of other boats around will inevitably be inversely proportional to the urgency of your situation. So in nice weather there are more likely to be people out who might come to your aid. In poor weather they are more likely to be tucked up at home.

Although it does raise an interesting point - would you be better, in oogle's position, spending say £300 on a sea anchor and sat phone/Epirb or on an Aux?
__________________
Poly is offline   Reply With Quote
Old 06 May 2010, 07:24   #15
Member
 
Country: Other
Town: Scotland
Boat name: Fiona
Make: Searider 5.4
Length: 5m +
Engine: Yamaha 90
MMSI: 235065959
Join Date: Aug 2007
Posts: 18
I wouldn't go far off shore without one, despite having VHF and flares etc I really donít want to be in a position of relying on the CG to come and rescue me. We have the same boat with an 8hp aux, yes itís a tight squeeze and the tiller hits the A frame but it has allowed us to land in a harbor and sort the main engine on one occasion. As for not seeing other vessels, the west side of Lewis can be a very lonely place and sitting in the deep water channel waiting for a 100,000 ton tanker to notice you isnít fun.
__________________
jimn is offline   Reply With Quote
Old 06 May 2010, 07:27   #16
RIBnet Supporter
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 13,772
RIBase
Just a few random observations:

I'd hate to use an epirb for a breakdown (assuming no imminent threat to life) - they'll send a feckin' helo and it's bye bye rib. At least the RNLI will give you a cuppa and a tow.

I often go the day without seeing another craft. Often on nice summer's days. Even Bogib was amazed at the lack of craft here - The Isles may be similar.

On a recent return to Rathlin from Gigha I saw only one craft (other than our company) - that was a supertanker, wouldn't want to ask him for a tow either.

Not that I needed to, I was already under tow having lost an engine during the day. I thought it was a failed fuel pump but it has been found to be a dead Engine Management Module - on a five years old, low hours, well maintained engine. So sh!t happens.

I wouldn't even consider those waters without either a backup engine or travelling in company.

I'd be happy enough to pooter around a safe haven - 10 Nm so long as I had good comms.
__________________
willk is offline   Reply With Quote
Old 06 May 2010, 08:15   #17
DM
RIBnet supporter
 
Country: UK - England
Boat name: Little Wing
Make: Searider 5.4
Length: 5m +
Engine: Tohatsu 90
Join Date: Aug 2002
Posts: 1,067
Quote:
Originally Posted by willk View Post
I wouldn't even consider those waters without either a backup engine or travelling in company.
Me neither.

Given his location, I'd be looking for something with twins.
__________________
DM is offline   Reply With Quote
Old 06 May 2010, 08:40   #18
Member
 
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,330
RIBase
Are the small battery powered motors worth considering ?
__________________
two stroke mick is offline   Reply With Quote
Old 06 May 2010, 09:01   #19
RIBnet Supporter
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 13,772
RIBase
Quote:
Originally Posted by DM View Post
I'd be looking for something with twins.
I ended up doing just that in Gigha - it was just that all 550hp worth of them were fitted in Tom McLaughlin's (previous) 11m Corryvreckan. As an auxiliary power source, I can highly recommend it.
__________________
willk is offline   Reply With Quote
Old 06 May 2010, 09:51   #20
Member
 
Knot Yet's Avatar
 
Country: UK - England
Town: Horsham
Boat name: Knot a RIB
Make: Avon Typhoon
Length: 4m +
Engine: Yamaha 25hp
Join Date: Sep 2009
Posts: 868
Biff fitted a most excellent aux bracket to our (ex) SR5.4 - it takes 3.5hp long shaft - not much room to steer the aux but you can use the main engine for this (or at least that's the idea we've never tested it!!)

We did need to get one custom made as the after market available products were either too flimsey or did'nt fit the space required.

Let me know if you need more photos etc

__________________

__________________
Sometimes my mind not only wanders ..... it leaves completely

Member of the ebay Blue RIB cover club.
Knot Yet 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 05:25.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×