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Old 01 November 2009, 14:49   #1
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Evinrude E-Tec Foot Prints

Does anybody know if the larger evinrudes have the same foot prints (i.e. bolt holes through the transom)

Im thinking 115 > 300 hp range

im planning an engine upgrade on my 5.2m RIB
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Old 01 November 2009, 14:51   #2
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Narwhal 520? Rated to 80hp? Are you thinking of an etec 75?
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Old 01 November 2009, 14:52   #3
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No...Im think evinrude 115+ with strenghting brackets
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Old 01 November 2009, 14:53   #4
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In that case, I'd recommend you think again.
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Old 01 November 2009, 15:02   #5
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thats not the attitude i was expecting !!! When someone said they were going to build a boat made of rubber i bet people told him to think again and im going on the same principle !!!!

I have tested it out interms of extra weight and the difference off my current engine and a 300hp etec is 80ish KG so i stuck my 100kg mate on the transom and went for a burn and the boat handled exactly the same if not marginally better.

I spoke to 1 of the nav archs at work about strenghting the transom and said its rated to 90hp and he said the same as you but i created the attached diagram and he eventually said it could work and work especially well if we got the angles and tesnion right (thats his job lol)

But, does anyone know if the foot prints are the same ?
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Old 01 November 2009, 15:09   #6
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What do your insurance say?
Your putting a bottle screw in to strengthn the transom, how do you know what the right tension is?
The boat may have rode ok with the extra weight but imagine the force when you land off a wave.

I was the same with my SR4 could get hold of a cheap 70hp or 75hp but was advised against it, went for a 55hp in the end.

The Max hp is their for a reason. The bottle screw will look crap and will effect the resale value of the boat.

Should go like stink though!
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Old 01 November 2009, 15:14   #7
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If the lad wants to do it and thinks he can achieve I say good luck to ya. Just be safe!!
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Old 01 November 2009, 15:16   #8
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If the lad wants to do it and thinks he can achieve I say good luck to ya. Just be safe!!
Says he with a 115hp hanging off an SR5.4
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Old 01 November 2009, 15:17   #9
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Says he with a 115hp hanging off an SR5.4
ahh but I didn't put it there
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Old 01 November 2009, 15:18   #10
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Quote:
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the difference off my current engine and a 300hp etec is 80ish KG
Am I right in saying you have a 1998 75 Mariner (according to your profile) which you believe is 80kg lighter than a 300 etec?
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