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Old 20 October 2003, 07:13   #1
Country: UK - England
Make: Avon 5.4
Length: 5m +
Engine: Yamaha 60FE -
Join Date: Sep 2003
Posts: 1,837
opinions please, 60hp on avon 4metre


Possibly got a chance of getting a 60hp outboard for 500, is this going to be a bit silly on my 4m avon searider, as I think its only rated to 50hp max??

Thanks in advance,


ollyit is offline   Reply With Quote
Old 20 October 2003, 07:56   #2
RIBnet supporter
Country: UK - England
Boat name: Little Wing
Make: Searider 5.4
Length: 5m +
Engine: Tohatsu 90
Join Date: Aug 2002
Posts: 1,067
The difference between a 50 and a 60 is only two lawn mowers. My last SR4 had a 70hp on it and was the 'funnest' boat I've ever owned except once when the throttle stuck open.

Waahaay factor = 10/10

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Old 20 October 2003, 09:11   #3
Country: UK - England
Town: Midlands
Make: Nautique
Length: 6m +
Engine: PCM 5.7l
Join Date: Oct 2003
Posts: 1,082
it will be massively overpowered and probly a mile over the maximum engine weight too.

The boat will be awfull. over the max hp makes for fun...but over the weight limit means it won't ride right, won't turn right and in the wrong hands potentially dangerous.
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Old 20 October 2003, 09:46   #4
Country: Ireland
Town: Cork
Boat name: Iago
Make: Cobra
Length: 5.8
Engine: Mariner 90 4-stroke
Join Date: Jul 2003
Posts: 42
In many cases, the only difference between a 50hp and 60hp engine is the size of the fuel jet within the carb. Chances are (depending on the model, manf.), the 60hp block may be identical to it's smaller hp brother.

Might be worth checking out...
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Old 20 October 2003, 09:56   #5
Country: UK - England
Town: Whitstable
Boat name: Tango
Make: Avon and Narwhal2.4m
Length: 4m +
Engine: 60HP Yamaha
Join Date: Oct 2002
Posts: 966
Have to agree with Mosser, its probably the same size block with different bore linnings, it wont effect the weight much, bore out a 50hp and makes it nearer to a 60hp.

should be fun and hey if you decide not to go with the 60hp give me a call as i'll take it of your hands and throw an extra bit your way for your trouble as i need a new engine at the moment.

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Old 20 October 2003, 10:40   #6
Country: Sweden
Town: Stockholm
Boat name: Osprey & Ring
Make: Osprey & Ring
Length: 9m +
Engine: Plenty
Join Date: Mar 2003
Posts: 860
right prop

even if you have the same weight of engine you will probably have higher speed, wich means that the boat can be unstabil in higher speeds, a good prop can make the boat go even better, i have a Osprey Viper max 5,8m with a Yamaha 150hp FETOL and i logged 49 knots with it and than it was very unstabil, i changed prop to a mercury high five, pitch 21 and boat was much more stabil in higher speeds.


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Old 20 October 2003, 10:43   #7
Country: UK - England
Boat name: Won't get Fooled Again
Make: Ribtec
Length: 6.5
Engine: Honda 130
Join Date: Mar 2002
Posts: 888
I'd go for it they build Avons strongly and you can allways use the throttle gently to be kind to the transom
I need a little bit of Rhythym and a little bit of Blues
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Old 20 October 2003, 11:17   #8
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Country: UK - England
Town: Dartmouth
Length: 6m +
Join Date: Feb 2003
Posts: 1,191

I've just got hold of a 4m sea-rider with a 50 on it and it's lethal!!! They tend to chine ride quite badly anyway but moving the engine on the transom can help. I can't imagine what its like with a 60!!!
Hypalon Tubes built in-house,retubing, repairs, Accessories
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Old 20 October 2003, 17:27   #9
Country: UK - England
Town: NW& wherever the boat is!
Boat name: depends on m'mood!
Make: Humbers/15-24m cats
Length: 6m +
Engine: etec130/big volvos
MMSI: many and various
Join Date: Nov 2001
Posts: 1,815
We sold our 4m searider this year - big mistake as it was a brill boat with a 50 yammie on it- absolutely no poblems with chine walking -ever- and very quick. used it for ski-ing wakeboarding training etc in all sorts of weather. So if the weight difference is small it should be worth a go
Dave M
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Old 21 October 2003, 07:10   #10
Country: UK - England
Town: Chelmsford/Anglesey
Make: Avon SR/RibLite 3.1m
Length: 4m +
Engine: Honda 30hp/Yam 8hp
Join Date: Jul 2003
Posts: 970
my last boat had a 70hp on it

[QUOTE]Originally posted by davidmanning
[B] My last SR4 had a 70hp on it

Yes, Dave, but one should point out that, as a retired paramedic, you would have been well equipped to stem the flow of blood and apply the necessary splints had you lost control of your massively overpowered Searider!


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