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Old 22 August 2013, 09:02   #1
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Max HP for a 6.5m Porters Renegade

Anyone out there know for sure the max HP and weight that a 6.5 Porters Renegade is rated for. Can't get an answer from Porters and their web site just states "most people are happy with a 120HP".

Thanks
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Old 22 August 2013, 09:10   #2
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Sorry, I don't have a definitive answer and it sounds like you're unlikely to get one. It might be worth having a marine engineer have a proper look at it.

I'd be staggered if it couldn't take at least a 150hp motor. I guess it comes down to the strength of the transom
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Old 22 August 2013, 09:46   #3
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its the same craft as a Tohatsu one design or a Solent 6.5 if that helps

plenty of Solents with 200 on them but they run very sweet with a 150 opti. (the back end can be a bit twitchy under the hammer)
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Old 22 August 2013, 10:40   #4
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its the same craft as a Tohatsu one design or a Solent 6.5 if that helps

plenty of Solents with 200 on them but they run very sweet with a 150 opti. (the back end can be a bit twitchy under the hammer)
Thanks, that was pretty much my thinking, but when you start looking for a used 150 they all disappear and 200s and 225 become very plentiful!! I will keep looking.
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Old 23 August 2013, 18:34   #5
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its the same craft as a Tohatsu one design or a Solent 6.5 if that helps

plenty of Solents with 200 on them but they run very sweet with a 150 opti. (the back end can be a bit twitchy under the hammer)
I don't mean to question your experience and obviously greater knowledge of RIBs than me Stu but are you sure it's the same Hull as a Solent or Tohatsu 6.5? I thought they were beamier and a shallower hull and were based on a BWM design. An older member, Mark ? had one with an upgraded Tohatsu 120 (140). He was pretty happy with its performance till the deck rotted out.
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Old 23 August 2013, 18:39   #6
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The Tohatsu One Design we had with n Opti 150 was very twitchy indeed. That hull was not rated to carry this engine. It had a 120hp limit if I remember correctly

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Old 23 August 2013, 23:18   #7
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I don't mean to question your experience and obviously greater knowledge of RIBs than me Stu but are you sure it's the same Hull as a Solent or Tohatsu 6.5? I thought they were beamier and a shallower hull and were based on a BWM design. An older member, Mark ? had one with an upgraded Tohatsu 120 (140). He was pretty happy with its performance till the deck rotted out.
Question it all you want mate wouldn't nr the first post I put up that was iffy.

OP please ignore my comments about HP and ratings sorry about that
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Old 24 August 2013, 05:16   #8
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There is a "formula" for working out the maximum design rating - my understanding is that you should only exceed this in the RCD ratings if you actually test and prove it is safe. This might prove a useful guide - it doesn't guarantee the transom is strong enough but it might be rough guide and if I remember correctly it is reasonably conservative? Search my posts for 'ISO maximum' and you might find it.
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Old 24 August 2013, 13:44   #9
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This is a big if... But if the Porters Renegade 6.5 is the same as the BWM Deepsea 21 then this might be of interest to you: bwm deepsea 21 info needed

Wasn't it a Paul Lemmer design, might be worth contacting him if it was.
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Old 25 August 2013, 05:13   #10
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I have a 2004 6.5m Porters which is rated to 140hp on the CE plate.

To settle the argument: The Solent and Tohatsu 6.5 are the same hull, originally a Phantom design. The BWM Deep Sea 21 is a Lemmer design which I gather was "acquired" by Porters. This has a wider beam and flared bow. Porters did also make a 6.5 which is based on the same Phanton hull used in the Solent and Tohatsu models. Complicated!!
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