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Old 25 August 2018, 13:38   #1
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Country: UK - England
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Advice on buying auxiliary engine please

Hi,
I just joined rib.net the other day and I'm looking for some good advice.
I recently bought a 14' rib with a Suzuki 25hp engine.
I'm wanting to take my family out soon but and thinking of getting a "get me home" back up engine.
Can anyone recommend a reasonably priced engine that would do the job.
That's in anticipation
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Old 25 August 2018, 15:07   #2
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Whats the rib? What's going to be useful for you will be very dependant on how much space you have on the transom.
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Old 26 August 2018, 08:13   #3
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Hi Nos4r2
It's a 14' zodiac classic M2, Aliminium floor.
I plan doing a little diving and fishing.
I will be taking my 2 sons and grand daughter, so was wanting the comfort of a spare engine in case the Suzuki 25hp has any problems.
Mainly a safety issue for me.
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Old 26 August 2018, 11:15   #4
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A lightweight solution is a Torqeedo. We offer them at discounts to RIBNet members . We are RIBNet trade members. Contact me if you want more info.

Cheers, Martin
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Old 26 August 2018, 12:13   #5
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3.3 mercury would be my 1st choice if buying used very portable things.

If buying new you are stuck with 4 stroke which means you are limited what side you can put it on its side.
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Old 26 August 2018, 12:24   #6
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OK - no probs. Plus 4 stroke are heavier!
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Old 26 August 2018, 13:15   #7
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I'd never argue against anyone fitting an aux engine but so much depends on usage factors.

I have decades of experience on the sea and take safety for myself and the family very seriously.... but I don't use an aux engine on a SIB.

The factors I consider include...

Your own experience and that of those going with you.

The area you will launch into and operate in.

The sort of distances you expect to travel.

How populated the waters are where you will operate.

Your trust in the condition of your main engine.

Alternative means of propulsion (oars/paddles).

Means of contact i.e. marine vhf/mobile phone.

Means of alerting attention such as flares etc.


If you decide you do want an aux remember you have to trust its condition and servicing needs are as good as your main engine so it will start and run reliably if you need it.

Space is tight on SIBs and I agree with above that one of the Mercury 3.3hp types would suit as they are very narrow and lightweight. In fact these engines of this size were marketed between 2-3.3hp and by several makes inc Mariner, Mercury, Tohatsu, Suzuki etc.

Remember an aux is often not a "get you home" engine. Say if you have gone some distance at the cruising speed a 25hp will allow then anything in the 2-4hp range will be a very long slog home. Best to think of them as being able to hold you off getting deeper into trouble while you make decisions and/or as a means of getting to a nearer safe haven.
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Old 26 August 2018, 13:34   #8
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Hi Fenlander,
Excellent advice, I agree safety is paramount.
Thanks Xk59D, I'll do some internet searching for that type.
I'm not planning on going too far out of the coast, just a bit of lobster diving etc, and some fishing.
There will most of the time only be me and my wife onboard.
I'm just looking at getting the Suzuki serviced as my main priority.
It dificult finding out where to take it, and it's bloody heavy lol.
I'll see if I can find anyone to come out to me.
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Old 26 August 2018, 13:36   #9
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Do you have mechanical aptitude or service your cars? A 25hp 2-stroke OB is quite a simple beast to service. If you went that way there's plenty of advice to be had on here.
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Old 26 August 2018, 13:49   #10
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Yeh I can service a car, so might be the best bet to gather some info on here.
Also what would be the best 3.3 a short or long shaft?
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