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Old 18 August 2009, 10:21   #1
jvb
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Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 45
Avon searider 5.4 with 60+HP 4stroke

Dear forum,
i am a new fan of your competent community and would like to ask advice for finding my ideal set up:

i am looking for a 5.4 avon searider with somewhat like 4stroke 60hp or bigger (not too heavy though).
i prefer a 4stroke as i sometimes need to go slow and quiet. (mainly only one person on the boat)
i dont mind a scruffy look as long as everything is functioning and reliable in any weather.
also the trailer doesnt need to be too fancy as i wont travel on land too much.
i would have it in sweet water (river Elbe) all year and use the trailer mainly just for launching it - and in winter storage.

i have a friend driving to london in 2 weeks from today who could tow it to germany for me.

i think about 5K would be a reasonable price.

any advise where to acquire would be a great help!
thank you!
jan
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Old 18 August 2009, 10:42   #2
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Country: UK - Wales
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Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 1,107
A 60 especially a heavy 4stroke will leave you wanting more power unless you dont mind being slow.
I dont think the performance is particularly inspiring with a 75 4 stroke either which would be near the max transom weight~170kgs
a 90 tohatsu or yamaha 2 stroke is nece on a 5.4.
seariders were designed when 4 strokes wern't available so theyr'e not ideal. but as you point out good economy at part throttle but with 3 on board and a 60 4 stroke you wont be needing part throttle other than to do 10 knots
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Old 18 August 2009, 10:45   #3
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Quote:
Originally Posted by jvb View Post
the trailer doesnt need to be too fancy as i wont travel on land too much.

jan
Presume it needss to get to germany though in the first place!

ollyit on here has a 5.4 he may sell with a 2 st evinrude. you can alyays change the engine.........
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Old 18 August 2009, 10:56   #4
jvb
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Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
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Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 45
Quote:
Originally Posted by doggypaddle View Post
Presume it needss to get to germany though in the first place!
oh yes, absolutely right. so should be able to make ferry, customs, and the german Autobahn-Polizei...
Quote:
Originally Posted by doggypaddle View Post
ollyit on here has a 5.4 he may sell with a 2 st evinrude. you can alyays change the engine.........
thank you! i was looking at recent ads in the forum lately. yet didnt find the perfect match.

i prefer a working set that has been driven. i agree a 75 or 90 would be better than 60, yet i think it shouldnt get too heavy in the back.
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Old 18 August 2009, 14:42   #5
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Country: Ireland
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Make: Lodestar 3.4
Length: 3m +
Engine: Yamaha 15hp 2 stroke
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Posts: 166
SR 5.4 with Mercury 90hp 2 stroke, which propellor?

I have recently purchased an Avon Searider 5.4 & I have fitted a new Mercury 90hp 2 stroke outboard. Its an extra long shaft (25") which fits the boat well as the transom is level at a height of 25" as it was formerly outfitted with twin engines.

The engine came supplied with a four blade 13 3/4 x 19" aluminium propellor which provides great lift & acceleration but a top end speed of just 32kn with two adults on board. Adjusting the engine tilt has a negligible increase in speed. I was hoping to get a higher top end speed than 32kn.

Could anybody with the same boat & a similar engine set up please let me know what size & type of propellor you are using?

Tks.
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Old 19 August 2009, 06:46   #6
jvb
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Country: Germany
Town: hamburg
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Make: SR 5.4
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Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 45
Quote:
Originally Posted by Zubenelgenubi View Post
I have recently purchased an Avon Searider 5.4 & I have fitted a new Mercury 90hp 2 stroke outboard. Its an extra long shaft (25") which fits the boat well as the transom is level at a height of 25" as it was formerly outfitted with twin engines.

The engine came supplied with a four blade 13 3/4 x 19" aluminium propellor which provides great lift & acceleration but a top end speed of just 32kn with two adults on board. Adjusting the engine tilt has a negligible increase in speed. I was hoping to get a higher top end speed than 32kn.

Could anybody with the same boat & a similar engine set up please let me know what size & type of propellor you are using?

Tks.
good question.
this is also interesting for me as i thought a pack like yours would be nice and fast(er).
maybe you should ask this question in a different forum? it is a bit hidden in here i guess.
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Old 28 August 2009, 12:49   #7
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Country: Denmark
Town: copenhagen
Make: Avon SR 4.7
Length: 4m +
Engine: E-tec 90hp
Join Date: Aug 2009
Posts: 77
i have a SR4.7 with a 2 stroke suzuki DT65 (98). currently i'm using the SS1400 (think it's 11-1/2 x 14) (stainless) propeller which gives around 33 knots. i've got 2 alu props as well and have tried a propulse composit also. The stainless is by far superior. Just now i'm considering to replace the 65 hp with a tohatsu 90 TLDI - i know it's a big one for the boat but i need the extra power to get out of the water when the boat is contains 4 persons and a lot of diving equipment. well it has been working fine since 98 ... so maybe i don't really need it ... but it would be nice :-)
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Old 01 September 2009, 10:15   #8
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Country: UK - Wales
Town: Llanfair p.g
Make: avon sr 5.4
Length: 5m +
Engine: yam 90hp aeto
Join Date: Jul 2007
Posts: 8
Quote:
Originally Posted by Zubenelgenubi View Post
I have recently purchased an Avon Searider 5.4 & I have fitted a new Mercury 90hp 2 stroke outboard. Its an extra long shaft (25") which fits the boat well as the transom is level at a height of 25" as it was formerly outfitted with twin engines.

The engine came supplied with a four blade 13 3/4 x 19" aluminium propellor which provides great lift & acceleration but a top end speed of just 32kn with two adults on board. Adjusting the engine tilt has a negligible increase in speed. I was hoping to get a higher top end speed than 32kn.

Could anybody with the same boat & a similar engine set up please let me know what size & type of propellor you are using?

Tks.
HI

I have 5.4 searider with yamaha 90hp 2 stroke weight 122kg, prop aluminium 13 3\4" x 17" pitch. top speed with two on board and 91 litres fuel 42mph, with one on board 44mph. engine rev to maxium 5500 revs. When I fit yamaha black ss prop 13 3/4 x 17" pitch top speed is reduced 35mph revs top out at 4800. When I bought my searider it was fitted with a dt 140hp 2 stroke weight 168 kg, fitted with 21" prop forget dia now. But top speed was 44mph on a calm day. Same speed as the 90hp, that's because the hull was desighned to do 44mph. Pick up with 140 hp was exceptional whole boat would lift out water, but you could only get top speed on calm day with all the weight placed in the front of boat and engine trim right in. Handling is great with the yamaha fitted suits the searider well, lightest 90hp 2 stroke there is. Does your engine rev to it's max rpm with the 19" prop if not try a 17"
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Old 02 September 2009, 17:57   #9
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Country: Ireland
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Make: Lodestar 3.4
Length: 3m +
Engine: Yamaha 15hp 2 stroke
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Posts: 166
I now have a 3 blade 13x19" aluminium prop & the engine is running at 6000 rpm (max rated is 5500). Im going to try a 21" prop, hopefully this weekend, this should reduce the rpm to 5500 ish & hopefully increase the top end speed. Its seems from all the SR gurus on here that a Laser II SS prop of 20" pitch is the way to go, a new one is $428 though!
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Old 04 September 2009, 18:00   #10
JSP
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Country: UK - England
Town: Southport
Boat name: Qudos
Make: 5.4 Searider
Length: 5m +
Engine: Yam 115 V4
MMSI: 235068784
Join Date: Sep 2008
Posts: 3,930
Going back to four strokes on 5.4 searider. My 115 V4 2 stroke weighs in at 163 KG, the max transom weight is 175kg. A Yamaha 90TLR 4 stroke is 168kg. So what would be stopping someone (me if any one can give me the money) sticking a 90 4 stroke on?
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