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02 June 2015, 20:54
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#1
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Member
Country: UK - Scotland
Town: Haddington
Make: Avon SR4
Length: 4m +
Engine: 50 Hp
Join Date: Apr 2015
Posts: 47
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SR4 With Yamaha 3 cylinder autolube 30 hp motor
Looking at a SR4 with Yamaha 30 HP thinking under powered or not..
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02 June 2015, 21:27
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#2
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,069
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Depends what you want to do with it?
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02 June 2015, 21:55
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#3
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Member
Country: UK - Scotland
Make: Humber Ocean Pro
Length: 3m +
Engine: Yam 200HP
Join Date: Jul 2009
Posts: 999
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There is a similar engined SR4 for sale at Port Edgar
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03 June 2015, 09:28
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#4
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Member
Country: UK - Scotland
Town: Haddington
Make: Avon SR4
Length: 4m +
Engine: 50 Hp
Join Date: Apr 2015
Posts: 47
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Quote:
Originally Posted by Nos4r2
Depends what you want to do with it?
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Just some fishing 
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03 June 2015, 09:32
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#5
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Member
Country: UK - Scotland
Town: Haddington
Make: Avon SR4
Length: 4m +
Engine: 50 Hp
Join Date: Apr 2015
Posts: 47
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Also guys is it easy to replace a valve on the sr4 .
Best place to buy the valve.
69cmw are you talking about your boat.
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03 June 2015, 10:23
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#6
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,069
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Quote:
Originally Posted by Lee40
Just some fishing |
If you're not doing long passages and not going out in nasty weather, then you should be fine with 30hp.
It's only for the more loony users that you really need trim and tilt and 40-50hp.
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03 June 2015, 14:26
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#7
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Member
Country: UK - England
Town: Dartmouth
Boat name: Puffling
Make: Avon Rover 3.4m
Length: 5m +
Engine: Mercury 15hp
Join Date: Jan 2002
Posts: 404
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3 cyl Yamaha
It is a criminal offence against the boating community...
There is only one 3 cylinder Yamaha to fit to a 4m SR and that is the 50hp...
30hp is good for say helping giving rest from paddling, but a 50hp.. just makes everything right!
Get a 50hp and just have a big grin on your face..
Same way 5.4m owners only like SR with 90 Yams on..
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Advanced Power Boat Instructor
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03 June 2015, 14:34
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#8
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Member
Country: UK - England
Town: Dartmouth
Boat name: Puffling
Make: Avon Rover 3.4m
Length: 5m +
Engine: Mercury 15hp
Join Date: Jan 2002
Posts: 404
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Apparently some people think it is acceptable to use 25hp on a searider....
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Advanced Power Boat Instructor
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03 June 2015, 16:31
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#9
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Member
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 288
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Quote:
Originally Posted by Lee40
Looking at a SR4 with Yamaha 30 HP thinking under powered or not..
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If you are going to use it for scuba, chuck a 50 on it and enjoy.
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03 June 2015, 17:06
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#10
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Member
Country: UK - Scotland
Town: Haddington
Make: Avon SR4
Length: 4m +
Engine: 50 Hp
Join Date: Apr 2015
Posts: 47
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Quote:
Originally Posted by badbaws
It is a criminal offence against the boating community...
There is only one 3 cylinder Yamaha to fit to a 4m SR and that is the 50hp...
30hp is good for say helping giving rest from paddling, but a 50hp.. just makes everything right!
Get a 50hp and just have a big grin on your face..
Same way 5.4m owners only like SR with 90 Yams on..
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Dam you sir thought had found my new toy but now thinking...  :speed boat:
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03 June 2015, 17:30
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#11
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Member
Country: UK - Scotland
Town: Haddington
Make: Avon SR4
Length: 4m +
Engine: 50 Hp
Join Date: Apr 2015
Posts: 47
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03 June 2015, 20:25
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#12
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Member
Country: UK - Scotland
Make: Humber Ocean Pro
Length: 3m +
Engine: Yam 200HP
Join Date: Jul 2009
Posts: 999
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SR4 With Yamaha 3 cylinder autolube 30 hp motor
69cmw are you talking about your boat.[/QUOTE]
No, not my RIB, Just letting you know what you can get for £3500 near you from a dealer.
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03 June 2015, 21:34
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#13
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Member
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 100hp Yam/150hp opt
Join Date: Sep 2003
Posts: 2,069
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My SR4m has a 30hp 3-cyl Yamaha and it's perfectly adequate. The engine is in very good condition and has power trim and tilt which makes a useful difference.
Does about 26/27 knots I think.
Suffers a bit of you load the boat up with gear and people though.
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03 June 2015, 23:23
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#14
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RIBnet admin team
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,632
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If you decided to upgrade you might find there is a market for 30HP engines with Power trim, electric start and a good service history - if that is the case.
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04 June 2015, 00:28
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#15
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Member
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,671
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Oh ffs. It's fine. I ran one with a 25 and it clocked 21 kits. I spent a week at the 19canteeen oppie nationals in one with that engine on tiller. No problem.
I have used a 5.4 with that engine and it planed.
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04 June 2015, 01:48
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#16
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Member
Country: Germany
Town: near Kiel, baltic sea
Make: Avon SR4
Length: 4m +
Engine: Tohatsu 30 4-stroke
Join Date: Oct 2013
Posts: 50
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My SR4 runs with a 30 HP 4 stroke Tohatsu, not underpowered i would say. Getting it on 27 knots 1 person (90 kg), and 24 knots with 2 persons. (+ 90 Kg)
With 2 persons and open flooding hull i wouldn´t like to go on nasty conditions, cause than it´s little underpowered. Alone (1 person) no problem.
A 4 blade Mercury spitfire prop 9.3 x 11 gives a much more quicker holeshot and acceleration than any 3 blade prop i figured out, even if hull is flooded with 1 person getting directly on to plane.
40 hp would be fine, 50 hp will make you a happy chine walk dancer! 
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09 June 2015, 16:08
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#17
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Member
Country: UK - England
Town: macclessfield
Boat name: Reach Out
Make: Quicksilver
Length: 4m +
Engine: 30hp Tohatsu EFI
Join Date: Aug 2010
Posts: 301
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I have a 4.1 m rib, light one, 30 hp efi tohatsu. Does the job, trim and tilt critical with only 30 hp. 30 hp is the top power rating for my boat, but 40 hp would be much better. For fishing a battery powered outboard will do, lol.....
Did clock 31.4 knots on sale water park according to my gps with 12 inch pitch stainless prop
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White Noise
War Shot
