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Old 10 January 2015, 23:35   #1
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2hp enough for 14ft RIB?

Would a axillary 2hp 2 stroke be strong enough to get back to shore pushing a 14ft glass bottom RIB?
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Old 10 January 2015, 23:51   #2
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Yes. Mounting it may or may not be a challenge. Some people have even mounted it above the tube, then outboard of the tube when in use.

They are super light! I have a 1970's 2 HP Evinrude.
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Old 11 January 2015, 01:05   #3
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i thought it might struggle against tide and say a 15knot wind, but they are so cheap used.

3.3hp are generally more knew here and cost too much.

for the price of some oars (not that we have row locks) we can get a 2hp old but reliable.

only issue is getting fuel into it while at sea from the main tote, never a safe or easy job, especially if a swell. any tips?
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Old 11 January 2015, 03:16   #4
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Rule of thumb for an aux is 1hp per metre length of boat. I think 2hp may struggle as you suggest.
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Old 11 January 2015, 05:56   #5
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I can move my 13ft boat with an old 2HP johnson 2 stroke. It is certainly not quick (I've never measured actual speed) - probably walking speed. I'm not sure it has enough oomph to move it against any real sea. I'm sure the prop selection is far from ideal for what we are asking it to do which won't help. I don't think wind is so much of a problem as waves - it really won't want to push it "uphill".

In terms of fuelling it, bear in mind that many problems with the "main" engine are fuel related; ideally you'd have a separate small tank for the aux. A 2HP won't use much fuel underway: less than a litre an hour. Since most have a 1L internal tank I don't think refuelling underway needs to be a problem - but it you really wanted to you could pump if from the main tank using the primer bulb (with the normal end removed or a suitable fitting attached to open it). Many of the really cheap 2HPs round here are premix 2 stroke - so you'll need to add oil too - so need a way to estimate the volume of petrol added.
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Old 11 January 2015, 13:55   #6
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i think a 3.3 would be a better option perhaps.
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Old 12 January 2015, 01:20   #7
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Although for SIB's, much of the information applies to RIB's too.

Need for an auxiliary engine on a SIB???
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Old 12 January 2015, 01:33   #8
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interesting thread. i dont have oars as the caribes dont come with row locks as they are just too big. they come with long paddles, which are useless for getting back to shore if you are 1km out, ok for launching etc.

im wondering if there is any way to temporary mount an auxillary without a proper mount, so i dont have to drill more holes in my transom.
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Old 12 January 2015, 03:29   #9
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i dont know if a longshaft 2hp would even reach the water on the back of my ship. going to have to get some measurements.

what are peoples thoughts, radio or auxillary more important? keeping in mind i have no oars/row locks.
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Old 12 January 2015, 03:31   #10
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Quote:
Originally Posted by SpearRib View Post
what are peoples thoughts, radio or auxillary more important? keeping in mind i have no oars/row locks.
Radio, radio, radio.
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