Reply
 
Thread Tools Search this Thread
 
Old 22 July 2019, 09:25   #1
Member
 
Bucksribster's Avatar
 
Country: UK - England
Town: Thame
Make: Ribcraft 585
Length: 5m +
Engine: Suzuki 140
Join Date: Mar 2012
Posts: 275
Cheap outboard for aux?

Has anyone actually bought any of the cheap outboards advertised on ebay? See for example:

https://www.ebay.co.uk/itm/KRAFT-DEL...EAAOSwFLlc7o0G

On the face of it a 5.8 hp outboard, only 10kg would make an ideal aux. Probably better / lighter / more reliable than my 40-year old Johnson 4hp.
__________________

__________________
Bucksribster is offline   Reply With Quote
Old 22 July 2019, 11:55   #2
Member
 
craig_c's Avatar
 
Country: UK - Scotland
Town: Inverkip
Boat name: Crusader
Make: Redbay 8.4 Exped
Length: 8m +
Engine: yamaha sterndrive
Join Date: Nov 2004
Posts: 599
RIBase
200 gets you a mariner/Suzuki/Yamaha 4hp longshaft

always works a treat, even on an 8m cabin boat

you always see these popping up and IMO they look rubbish,

watched a video about some yanks buying them on amazon, they had to fix it before it would run

same with parsuns, why are they always for sale non running...
__________________

__________________
2006 Redbay 8.4 Expedition "Crusader"
craig_c is offline   Reply With Quote
Old 22 July 2019, 12:11   #3
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,016
Even if you feel tempted - look at the spec in terms of CC, HP, RPM etc and compare to both some strimmers and well known outboards. I suspect the HP outputs are just made up not validated.

If you do go this way - but some ear defenders - air cooled = deafening.
__________________
Poly is offline   Reply With Quote
Old 22 July 2019, 12:17   #4
RIBnet admin team
 
Nos4r2's Avatar
 
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: 12,822
RIBase
The idea of an auxiliary is that when your main engine stops, the aux ALWAYS works.


(I'll just leave that there...)
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 22 July 2019, 13:05   #5
Member
 
Bucksribster's Avatar
 
Country: UK - England
Town: Thame
Make: Ribcraft 585
Length: 5m +
Engine: Suzuki 140
Join Date: Mar 2012
Posts: 275
Thanks guys. 200 would not buy a new Suzuki / Yam / Mariner, and it would weigh more. I had an old long shaft Yam 5hp once, but it would not fit onto the transom of my RC585 directly, and it was pretty heavy. The old Johnson I have is a bit lighter, but it is a b***er to start sometimes, and I doubt it is still pushing out 4hp.

Take Poly's point on HP etc. Might look into that. For an aux, noise is probably not a big problem.
__________________
Bucksribster is offline   Reply With Quote
Old 22 July 2019, 13:15   #6
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,016
Quote:
Originally Posted by Bucksribster View Post
Thanks guys. 200 would not buy a new Suzuki / Yam / Mariner, and it would weigh more.
I think Craig was suggesting that a 200 used one would likely be way more reliable.
__________________
Poly is offline   Reply With Quote
Old 22 July 2019, 13:43   #7
Member
 
spartacus's Avatar
 
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 60hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 3,708
RIBase
Ah, the old auxilliary engine question!

There's no point trying to save money or cut corners on your back-up engine.

2-stroke and 4-stroke outboards are perfectly serviceable, even if they're old. My Mariner 4hp (2-stroke) purrs like a kitten! In the years I've had it's failed just once on a test start with a blocked impeller (salt build up). I now run it in fresh water regardless if I've used it and service it annually.
__________________
Is that with or without VAT?
spartacus is offline   Reply With Quote
Old 22 July 2019, 13:52   #8
Member
 
Locozodiac's Avatar
 
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider 450 Rib
Length: 4m +
Engine: Tohatsu 5/18/30 HP
Join Date: Sep 2007
Posts: 1,861
You guys boat on rough water cond most of the time, if so, a 4 HP is a very poor aux specially if facing strong currents, winds, rough water cond. Personally would go straight for a 2 strokes 9.8 HP motor with a maximized prop (less pitch prop) to pull wot revs towards max wot rpm range factory stated to push combo much better at fast displacement speed.

A 2 strokes 4-5 HP are around 100 CC compared to 170 CC of a 8-9.8 HP motor.

Happy Boating
__________________
Locozodiac is offline   Reply With Quote
Old 22 July 2019, 13:59   #9
Member
 
Last Tango's Avatar
 
Country: UK - Scotland
Town: Denny
Boat name: Hebridean Storm
Make: Coastline
Length: 6m +
Engine: Mariner F150
MMSI: 235107505
Join Date: Mar 2013
Posts: 1,503
Quote:
Originally Posted by Bucksribster View Post
Has anyone actually bought any of the cheap outboards advertised on ebay? See for example:

https://www.ebay.co.uk/itm/KRAFT-DEL...EAAOSwFLlc7o0G

On the face of it a 5.8 hp outboard, only 10kg would make an ideal aux. Probably better / lighter / more reliable than my 40-year old Johnson 4hp.
I know Duncan's were left with few of these and they took a "hit" on them because they proved to be that unreliable they felt it would be wrong to sell them to anyone.

Old small outboards run forever if they're looked after. You'd be much better off with and older "brand name" motor.
__________________
Last Tango is offline   Reply With Quote
Old 22 July 2019, 17:41   #10
Member
 
Country: UK - Wales
Town: Cardiff
Length: no boat
Join Date: Aug 2014
Posts: 1,255
How do they get that much more power out of the same displacement compared to a stihl chainsaw? 4.3kw? Stihl 58cc saw are 3.5kw thats a 20% more power?

Also parts for these types are expensive and required frequently if the strikers etc are anything to go by.... the orange casing is a nice touch...
__________________
HDAV is offline   Reply With Quote
Old 22 July 2019, 17:52   #11
Member
 
Bucksribster's Avatar
 
Country: UK - England
Town: Thame
Make: Ribcraft 585
Length: 5m +
Engine: Suzuki 140
Join Date: Mar 2012
Posts: 275
Looking at the spec, it is only 60 cc, so it is hard to see how they get so much power out. Probably not a realistic performance then.

A 4 hp yam/ mariner/ suzi i guess will be heavier than my Johnson? What would be the best power to weight outboard then?
__________________
Bucksribster is offline   Reply With Quote
Old 22 July 2019, 18:13   #12
Member
 
Country: UK - Scotland
Town: Glasgow
Length: no boat
Join Date: Jan 2012
Posts: 30
Quote:
Originally Posted by Bucksribster View Post
Looking at the spec, it is only 60 cc, so it is hard to see how they get so much power out. Probably not a realistic performance then.

A 4 hp yam/ mariner/ suzi i guess will be heavier than my Johnson? What would be the best power to weight outboard then?
A "good" 60cc engine will make 5hp easily but they cost far more than this entire outboard. The problem is the lack of torque so you need to spin them upto high revs to get max HP. due to said lack of torque they are not best suited to an outboard I would not think.

What about a mariner 3hp or similar?
__________________
nocando is offline   Reply With Quote
Old 23 July 2019, 01:58   #13
Member
 
beerbelly's Avatar
 
Country: UK - England
Town: teesside
Make: valiant v570
Length: 5m +
Engine: mercury 100
MMSI: 232012453
Join Date: Apr 2014
Posts: 1,071
Quote:
Originally Posted by Locozodiac View Post
You guys boat on rough water cond most of the time, if so, a 4 HP is a very poor aux specially if facing strong currents, winds, rough water cond. Personally would go straight for a 2 strokes 9.8 HP motor with a maximized prop (less pitch prop) to pull wot revs towards max wot rpm range factory stated to push combo much better at fast displacement speed.

A 2 strokes 4-5 HP are around 100 CC compared to 170 CC of a 8-9.8 HP motor.

Happy Boating
he has a point I had a brand new mariner 4hp 4stroke that I tried on my 5.7 valiant on a mirror glass flat calm windless day and it made 4.5 knts I figured throw in a bit of chop and a head wind and its going nowhere so I sold it and bought a very good second-hand 8hp mercury 2 stroke haven't tried it yet but im confident it will be better
__________________
beerbelly is offline   Reply With Quote
Old 23 July 2019, 06:57   #14
Member
 
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 5,475
bigger HP is better but getting it on the transom is the problem for most boats
__________________
jeffstevens763@g is offline   Reply With Quote
Old 24 July 2019, 03:04   #15
Member
 
Bucksribster's Avatar
 
Country: UK - England
Town: Thame
Make: Ribcraft 585
Length: 5m +
Engine: Suzuki 140
Join Date: Mar 2012
Posts: 275
So what auxs have people used on a ribcraft 585 then?
__________________
Bucksribster is offline   Reply With Quote
Old 24 July 2019, 03:18   #16
Member
 
Iankristy's Avatar
 
Country: UK - Scotland
Town: Scotland
Boat name: Skua
Make: Ribcraft
Length: 8m +
Engine: Suzuki df250 4stroke
Join Date: May 2015
Posts: 146
Cheap outboard for aux?

Quote:
Originally Posted by Bucksribster View Post
So what auxs have people used on a ribcraft 585 then?


I have a Suzuki 8hp 4stroke for sale used on a 7.8. Prob done less than 10 hours
__________________
Iankristy is offline   Reply With Quote
Old 24 July 2019, 04:01   #17
Member
 
Iankristy's Avatar
 
Country: UK - Scotland
Town: Scotland
Boat name: Skua
Make: Ribcraft
Length: 8m +
Engine: Suzuki df250 4stroke
Join Date: May 2015
Posts: 146
Notice the cheapie doesnt have reverse either. Could get interesting
__________________
Iankristy is offline   Reply With Quote
Old 24 July 2019, 06:02   #18
Member
 
Bucksribster's Avatar
 
Country: UK - England
Town: Thame
Make: Ribcraft 585
Length: 5m +
Engine: Suzuki 140
Join Date: Mar 2012
Posts: 275
Quote:
Originally Posted by Iankristy View Post
I have a Suzuki 8hp 4stroke for sale used on a 7.8. Prob done less than 10 hours
Thanks, but I suspect it would be too big / heavy for a 585.
__________________
Bucksribster is offline   Reply With Quote
Old 24 July 2019, 07:16   #19
Member
 
Phil M's Avatar
 
Country: UK - England
Town: Whitehaven
Boat name: Cerberus
Make: Destroyer 5.8
Length: 5m +
Engine: 115hp Merc 4st
Join Date: Oct 2012
Posts: 460
I have a tohatsu 6ph 4st on my Destroyer 5.8. Not the same boat but similar size. It has less than an hour on the aux so I haven't had it to full throttle yet to test top speed but it moves the boat around the marine easily.

Phil
__________________
Phil M is offline   Reply With Quote
Old 24 July 2019, 08:03   #20
Member
 
Country: UK - England
Town: Lincoln
Boat name: Ace of Spades
Make: RIBCRAFT
Length: 5m +
Engine: 140
Join Date: Aug 2017
Posts: 9
Quote:
Originally Posted by Bucksribster View Post
So what auxs have people used on a ribcraft 585 then?
I've got a Suzuki 6hp on mine. It fits next to the 140HP ok, but I'm not sure anything much bigger would fit without causing issues.

It pushes the boat along at 6knts WOT on flat water. About 4knts when dialed down to about 3/4 throttle. Personally, I wouldn't want to go with anything much smaller than that.

BTW, the previous owner ordered the boat from Ribcraft with the aux already installed. However, I don't know whether it was him or Ribcraft that came up with the engine choice.
__________________

__________________
AndyMc is offline   Reply With Quote
Reply

Tags
outboard

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 20:29.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×