Reply
 
Thread Tools Search this Thread
 
Old 27 July 2009, 16:01   #21
Member
 
Country: UK - England
Town: gravesend
Boat name: curach/Earl
Make: seago/Lifeguard 4M
Length: under 3m
Engine: 3.3 marinar/10 hp
Join Date: Jul 2008
Posts: 802
Quote:
Originally Posted by lightning View Post
About 0.7hp would be my estimate.
Arh, many thanks ,well i won t be getting any g forces with that speed ,LOL
__________________

__________________
thornbackflound is offline   Reply With Quote
Old 27 July 2009, 17:19   #22
Member
 
lightning's Avatar
 
Country: UK - England
Town: Marple
Make: Zodiac
Length: under 3m
Engine: Tohatsu 9.8
Join Date: Jun 2009
Posts: 579
Engine

I looked on You Tube and the Mariner 3.3/3.5hp seems to go quite well when fitted to a small craft with one or two people on board.
__________________

__________________
lightning is offline   Reply With Quote
Old 27 July 2009, 18:00   #23
Member
 
Country: UK - England
Town: Bristol
Boat name: Happy Days
Make: Zodiac
Length: 3m +
Engine: Mariner 4St/4HP
Join Date: Jul 2009
Posts: 83
Send a message via Skype™ to MikeP
Hmm,

We've just had our first blast around Bristol Harbour with our 3.1m Zodiac Zoom - on a lovely sunny evening after work (a minor miracle getting out in time !)

This is the first time we've opened our 4HP Mariner up as we're still running it in, but I *think* we got onto the plane (certainly noticed the change in attitude as per the other Bristol Harbour Hooligan).

However, elation was swiftly dampened when we were overtaken by a rowing boat.

Admittedly manned by 8 burly blokes using two hands on a single oar each, but it was still a rowing boat.

Harumph.
__________________
MikeP is offline   Reply With Quote
Old 28 July 2009, 04:43   #24
Member
 
lightning's Avatar
 
Country: UK - England
Town: Marple
Make: Zodiac
Length: under 3m
Engine: Tohatsu 9.8
Join Date: Jun 2009
Posts: 579
Speed

I just had a similar experience with my new Zodiac 285s/Mariner 6hp. It seems that you can get to about 5mph with no problem and hardly any RPM. Accelerating after that raises the bow considerably but does not increase the speed much, until you get it "on the plane", and then it's quite a bit faster.
The maximum displacement speed on my 285s is given as 12mph, which seems to be about what you can get with a 4/5/6hp engine. (I have not managed this, but have been unable to try, as I've only been on the canal so far)
I would imagine that an 8-man rowing boat would be capable of similar speeds.
__________________
lightning is offline   Reply With Quote
Old 28 July 2009, 17:34   #25
Member
 
Country: UK - England
Town: Bristol
Boat name: Happy Days
Make: Zodiac
Length: 3m +
Engine: Mariner 4St/4HP
Join Date: Jul 2009
Posts: 83
Send a message via Skype™ to MikeP
Youtube and I have been fighting all day over this one, but for anyone interested vaguely in seeing Bristol Harbour and my bald spot, here's a short precis of our adventure Monday evening.



On an ironic note, after we'd got back to base, I checked the fuel level in the outboard and noticed we were about two teaspoons away from breaking out the oars. Our previous couple of outings having been on the 4mph canal and river system, and I had started to think we could be the proud owners of an infinitely refilling fuel tank as we seemed to use so little petrol and could spend a good couple of hours plus out on the canal without worrying about go juice.

Funnily enough, it turns out that if you turn up the revs, you chew through the gas. I never would have thought :-)

On a serious note, if we don't kit ourselves up with an external fuel tank, we're faced with doing a refuel from the placcy 5 litre can on the water. This doesn't feel intuitively safe to me - but am I being a bit over cautious ??
__________________
MikeP is offline   Reply With Quote
Old 28 July 2009, 17:41   #26
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,112
Quote:
Originally Posted by MikeP View Post
On a serious note, if we don't kit ourselves up with an external fuel tank, we're faced with doing a refuel from the placcy 5 litre can on the water. This doesn't feel intuitively safe to me - but am I being a bit over cautious ??
Whether it is actually unsafe or not is a matter for debate (and might depend on where your filler is etc), But its certainly a PITA and likely to be messy in anything but ideal conditions.
__________________
Poly is offline   Reply With Quote
Old 28 July 2009, 18:00   #27
Member
 
Country: UK - England
Town: Bristol
Boat name: Happy Days
Make: Zodiac
Length: 3m +
Engine: Mariner 4St/4HP
Join Date: Jul 2009
Posts: 83
Send a message via Skype™ to MikeP
My current refueling scenarios are based on being tied up to a bit of bank somewhere - be it in the Bristol floating harbour or on the canal or non-tidal river Avon. Not a challenging environment for having a nice cup of tea, but do the same gut feel metrics apply to sloshing more petrol into your outboard ? Our little 4HP Mariner has a top filling tank which is easy enough to deal with on dry land, but I guess I'm more concerned about spillage into the water than anything else.

Actually, having re-read the above back to myself, I think that refuelling on the water is a bad idea full stop as a spillage will inevitably be bad. So there's a point to note when buying your first outboard motor - how big is the fuel tank!

Back down to Saltford marina next week to look into external fuel tanks then.....
__________________
MikeP is offline   Reply With Quote
Old 28 July 2009, 18:13   #28
Member
 
Country: UK - England
Boat name: Pisces
Make: Zodiac
Length: 4m +
Join Date: Jan 2009
Posts: 145
Careful MikeP

What has PrairieTuber said about laying music tracks onto SIB Vids?

You know it interferes something dreadful with his hearing aid.

Crazy kids!

;-)
__________________
My Videos

http://www.vimeo.com/2701620
Sharkbyte is offline   Reply With Quote
Old 28 July 2009, 18:30   #29
Member
 
Bigmuz7's Avatar
 
Country: UK - Scotland
Town: Glasgow
Boat name: stramash
Make: Tornado
Length: 5m +
Engine: Etec 90
Join Date: Feb 2006
Posts: 5,068
Quote:
Originally Posted by lightning View Post
About 0.7hp would be my estimate.

..
__________________
Bigmuz7 is offline   Reply With Quote
Old 29 July 2009, 03:25   #30
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,112
Quote:
Originally Posted by MikeP View Post
My current refueling scenarios are based on being tied up to a bit of bank somewhere - be it in the Bristol floating harbour or on the canal or non-tidal river Avon. Not a challenging environment for having a nice cup of tea, but do the same gut feel metrics apply to sloshing more petrol into your outboard ? Our little 4HP Mariner has a top filling tank which is easy enough to deal with on dry land, but I guess I'm more concerned about spillage into the water than anything else.

Actually, having re-read the above back to myself, I think that refuelling on the water is a bad idea full stop as a spillage will inevitably be bad. So there's a point to note when buying your first outboard motor - how big is the fuel tank!

Back down to Saltford marina next week to look into external fuel tanks then.....
Ah OK. Small boat even tied up with all the weight at the back it will be a bit wobbly you will almost certainly spill some trying to get it to pour out of a can (they never flow well do they - although I notice someone advertising a new "spout" in all the boating media to "solve this problem"). The amount you spill will not be Exxon Valdese scale, probably won't be a particular fire hazard etc - so if I had to - I would. But if everyone did it all the time the world would be somewhat less pleasant (and within a Harbour/Canal you seriously risk upsetting the authorities - who can usually issue heavy fines for pollution).

If your outboard has a fitting for an optional eternal tank I would look at that (a small 12L tank is probably plenty). If it doesn't it may not be that easy to retro fit - and I would then look at ways of filling through the top that don't involve "pouring". i.e. a small hand pump. There are syphon devices around but that will mean holding the can above the engine - nicer if you can leave it on the deck - with a hose plumbed in (or on a quick release connector).
__________________
Poly is offline   Reply With Quote
Reply

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 22:34.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.