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18 January 2012, 07:51
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#1
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Member
Country: UK - Wales
Town: swansea
Boat name: swanseabeast
Make: avon searider
Length: 4m +
Engine: 55 yam
Join Date: Nov 2011
Posts: 30
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mounting engine to 4m sr
mrs bought me a nice secondhand 55hp yam engine for xmas 
but do you mount it exactly dead centre of transum or slightly to one side? never fitted one so this is my first time and dont want to mess it up as mates say that if i get it wrong she`ll pitch all over the place
any help be excellent
leigh
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18 January 2012, 08:04
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#2
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Member
Country: UK - England
Town: Telford
Boat name: ?
Make: Searider
Length: 4m +
Join Date: Nov 2010
Posts: 99
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hi, on the SR4's i have had in the past , always mounted on the centre line and had no problem, you do realise that the max HP on a SR4 is 50 hp.
http://www.rib.net/forum/attachment....1&d=1326877460
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18 January 2012, 08:09
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#3
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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: 5,217
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I had a Yam 55 on mine and it went fine, just inform your insurance to make sure they're happy?
Had mine in the centre.
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18 January 2012, 08:25
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#4
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Member
Country: UK - Wales
Town: swansea
Boat name: swanseabeast
Make: avon searider
Length: 4m +
Engine: 55 yam
Join Date: Nov 2011
Posts: 30
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sure a few extra horses wouldnt hurt it to much lol
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18 January 2012, 08:28
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#5
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Member
Country: UK - Wales
Town: swansea
Boat name: swanseabeast
Make: avon searider
Length: 4m +
Engine: 55 yam
Join Date: Nov 2011
Posts: 30
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would fitting a sock affect positioning of engine?
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18 January 2012, 09:49
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#6
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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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I assume by sock you mean a drain trunk? if so, no......
.....unless you are ftting twins, in which case the drain sock needs to be centre on the transom to fit between the engines! 
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18 January 2012, 12:05
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#7
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Member
Country: UK - England
Town: Telford
Boat name: ?
Make: Searider
Length: 4m +
Join Date: Nov 2010
Posts: 99
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Quote:
Originally Posted by swansea beast
sure a few extra horses wouldnt hurt it to much lol
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as Chewy said, MAKE SURE the insurance company are happy, as fitting it and not telling them could leave you wide open to all sorts of problems if god forbid you hit something / injured some one, better to be safe than sorry.
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18 January 2012, 13:54
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#8
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Member
Country: UK - Wales
Town: swansea
Boat name: swanseabeast
Make: avon searider
Length: 4m +
Engine: 55 yam
Join Date: Nov 2011
Posts: 30
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insurance 
shes a long way off yet before i need to think of getting her insured lol
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19 January 2012, 09:29
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#9
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Member
Country: Netherlands
Make: Eurorib WCR deep V
Length: 4m +
Engine: E-tec 90 hp
Join Date: Jan 2012
Posts: 5
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I am not sure, but I believe that the old Yammies are not measured at the prop. So there is a 10% loss in HP... so you still have a 50 Hp
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19 January 2012, 12:12
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#10
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Quote:
Originally Posted by Bryan
I am not sure, but I believe that the old Yammies ...
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Do you know the age of this motor?
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19 January 2012, 12:53
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#11
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Member
Country: Netherlands
Make: Eurorib WCR deep V
Length: 4m +
Engine: E-tec 90 hp
Join Date: Jan 2012
Posts: 5
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I assume it is an older model, since they don't make them any more.
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19 January 2012, 15:33
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#12
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Yams have been propshaft rated for many years
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20 January 2012, 18:09
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#13
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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: 5,217
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Quote:
Originally Posted by Bryan
I am not sure, but I believe that the old Yammies are not measured at the prop. So there is a 10% loss in HP... so you still have a 50 Hp
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Won't matter to the insurance company, bit like saying its lost ex amount of hp over the last 20 years so its actually only a 40hp.
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20 January 2012, 18:59
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#14
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Member
Country: UK - England
Town: Birmingham
Make: Avon SR4
Length: 4m +
Engine: Yam 55
Join Date: Jun 2009
Posts: 75
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yam 55
Quote:
Originally Posted by chewy
Won't matter to the insurance company, bit like saying its lost ex amount of hp over the last 20 years so its actually only a 40hp.
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Tits  I was going to try that one if i ever had problems with the insurance
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