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27 November 2010, 16:06
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#1
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Member
Country: UK - England
Town: Shropshire
Boat name: Bitsa
Make: SR5.4 Project
Length: 5m +
Engine: Charger 85 hp
MMSI: 235080983
Join Date: Nov 2010
Posts: 69
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What size engine is best for a SR4?
as in the title, what size is best suited to a SR4 ? my first one had a 35 Chrysler ( but as in other thread i realise now i had 1/2 ton water in the belly LOL )
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27 November 2010, 17:12
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#2
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RIBnet supporter
Country: UK - England
Town: Cumbria/London/Brittany
Boat name: Into the Red
Make: Osprey Vipermax
Length: 7m +
Engine: 'Rude E-tec 250HO
MMSI: 235 076 114
Join Date: Apr 2009
Posts: 1,139
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Something around 50hp is the norm I think
Although it will chine walk severely at WOT with a light load
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28 November 2010, 12:42
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#3
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Member
Country: UK - England
Town: Southampton
Make: Tornado
Length: 5m +
Engine: 90 Yam 2/
Join Date: Jun 2010
Posts: 301
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Im sure some lunatic will post that they have had a 70+ on one 
However i've used them with 25 - 40hp over the years and id say it depends on what you want to do with it.
Safety cover for a Yacht Club - 25 hp is enough.
Waterski/Dive 40/50hp (bung up hull too if your waterskiiing)
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28 November 2010, 15:21
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#4
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Member
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 4,997
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50hp should do it!
I've got a Yam 55 on mine and it goes nicely.
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28 November 2010, 17:01
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#5
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Member
Country: UK - England
Town: Shropshire
Boat name: Bitsa
Make: SR5.4 Project
Length: 5m +
Engine: Charger 85 hp
MMSI: 235080983
Join Date: Nov 2010
Posts: 69
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Thanks for the replys so far lads, i have a choice of either a 50 Evinrude (ex RNLI ) 1993, or a Force 40 again 1993, or even an electrolux penta E50 ( 1965........ well i do collect old engines and restore for fun )
will prob try the evinrude first, good choice ?
I Guess the Chrysler 75 skier will be too big... !!!!!!!!!!!!!! :-) LOL
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28 November 2010, 17:06
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#6
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RIBnet admin team
Country: UK - England
Town: Swindon
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 239050687/235055163
Join Date: Jul 2005
Posts: 8,881
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What you really want on there is a Yam 50. 3 cylinder with power trim. Either that or the equivalent Merc or Mariner with power trim. Nothing else will be close-and having power trim makes a massive difference to the boat. That's assuming you want a really mad fun boat.
Sell an engine and buy a Yam or a Merc
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28 November 2010, 17:31
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#7
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Member
Country: Ireland
Town: Donegal
Boat name: Deep Six
Make: Redbay Stormforce
Length: 6m +
Engine: Suzuki 140 4/stroke
Join Date: Mar 2008
Posts: 101
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50 50 50
Had a 30hp yam 2stroke, upgraded to a 50hp yam 2stroke.... never looked back since, forward is now way too much fun ! best o luck !
Donegaldan
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28 November 2010, 18:26
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#8
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Member
Country: UK - England
Town: Shropshire
Boat name: Bitsa
Make: SR5.4 Project
Length: 5m +
Engine: Charger 85 hp
MMSI: 235080983
Join Date: Nov 2010
Posts: 69
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well , the Evinrude 50 now has PTT but is only two pots, the force is also PTT and two pots, where as the Electrolux penta is a 3 cyl ultra light weight racing engine, or as you say , sell em all and get a yam 50 3 pot,, tough choices
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28 November 2010, 18:30
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#9
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Member
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 4,997
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What price is the Rude?
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28 November 2010, 18:38
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#10
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RIBnet admin team
Country: UK - England
Town: Swindon
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 239050687/235055163
Join Date: Jul 2005
Posts: 8,881
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Quote:
Originally Posted by wolfie
well , the Evinrude 50 now has PTT but is only two pots, the force is also PTT and two pots, where as the Electrolux penta is a 3 cyl ultra light weight racing engine, or as you say , sell em all and get a yam 50 3 pot,, tough choices
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Use the Rude or buy a Yam
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