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16 November 2013, 22:17
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#1
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Member
Country: UK - England
Town: Northumberland
Boat name: Northern Storm
Make: North Diver?
Length: 4m +
Engine: Yamaha 90 Autolube
MMSI: 235096344
Join Date: Aug 2012
Posts: 546
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Auxillary engine
Just wondering how many of you folk have an aux engine as backup and if so would you post pics???
I've a 5 hp Honda 4stroke and not sure if need bracket or not ?? Also clearance on main 90 yam looks tight
Regards
Graham
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16 November 2013, 23:24
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#2
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,642
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If possible mount on the transom. Adjustable brackets rattle like a Vauxhall Viva on on a frosty morning! Seriously, if space on the transom is tight, then use a fixed bracket, and make sure to ratchet the motor to when underway. The tilt bolt on most auxiliaries won't put up with the vibration and constant pounding. My Mariner 4hp sits snug as a bug next to my Twatsoo 60hp main oil burner.
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17 November 2013, 03:44
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#3
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Member
Country: USA
Town: CA
Make: Zodiac RIB-P
Length: 7m +
Engine: Suzuki 250
Join Date: Aug 2010
Posts: 1,235
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Good picture. I had been thinking about this too. I am putting a single on my 7m zodiac but was torn at not being able to go with twins. I wasn't sure if I could fit something smaller next to it.
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17 November 2013, 07:38
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#4
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,642
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Post a picture of the transom Graham.
I'd have thought you'd be able to squeeze in the auxilliary engine. If you have an A-frame, then it's a little more complicated. The Honda won't be as neat as say a 2-stroke but let's see what space is available.
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17 November 2013, 08:05
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#5
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Member
Country: UK - England
Town: Northumberland
Boat name: Northern Storm
Make: North Diver?
Length: 4m +
Engine: Yamaha 90 Autolube
MMSI: 235096344
Join Date: Aug 2012
Posts: 546
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I'm working away at the moment but this is what I have on phone already
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17 November 2013, 08:09
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#6
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Member
Country: UK - England
Town: Northumberland
Boat name: Northern Storm
Make: North Diver?
Length: 4m +
Engine: Yamaha 90 Autolube
MMSI: 235096344
Join Date: Aug 2012
Posts: 546
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Reason I got the 5hp was so I didn't have to mix fuel as the 90 yam is auto mix and meant if ever needed I can use the main fuel tanks with it being 4stroke
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17 November 2013, 08:13
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#7
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Member
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,767
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If you put the Yam on Hard Lock does it touch the Honda?
If you have the Yam down in the central position, either tilted or not tilted can you turn the honda "lock to lock" (not sure if the honda actually has a lock!) If not - can you lock the honda centrally and use the big engine as a rudder?
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17 November 2013, 08:16
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#8
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,642
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What auxilliary engine is on there just now?
I know where there's a tidy long-shaft Yammie 4hp if you wanted something slimmer than the Honda. Easy enough to refuel, but you would need to carry oil on board.
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17 November 2013, 09:04
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#9
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Member
Country: UK - England
Town: Northumberland
Boat name: Northern Storm
Make: North Diver?
Length: 4m +
Engine: Yamaha 90 Autolube
MMSI: 235096344
Join Date: Aug 2012
Posts: 546
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That's the honda 5hp, kind of want to keep the 5hp as will push boat nicely if needs be, it is tight but think there should be room just thinking may need bracket to get it out water , no drag etc ?
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17 November 2013, 12:38
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#10
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Member
Country: UK - England
Town: Enfield/Switzerland
Boat name: Zonneschijn II/Vixen
Make: Shakespeare/Avon
Length: 7m +
Engine: Evin' 175 DI /Yam 90
MMSI: 235055605
Join Date: May 2006
Posts: 1,436
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Quote:
Originally Posted by "Gramas;
it is tight
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As engines are normally offset you might find it less tight one side than the other.
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17 November 2013, 12:49
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#11
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Member
Country: UK - England
Town: Northumberland
Boat name: Northern Storm
Make: North Diver?
Length: 4m +
Engine: Yamaha 90 Autolube
MMSI: 235096344
Join Date: Aug 2012
Posts: 546
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Now we getting technical haha not sure if mine is ? Can't check till home in few weeks and really don't fancy moving it as bolted
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17 November 2013, 15:02
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#12
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,642
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Quote:
Originally Posted by Gramas
That's the honda 5hp, kind of want to keep the 5hp as will push boat nicely if needs be, it is tight but think there should be room just thinking may need bracket to get it out water , no drag etc ?
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Looks like plenty room to me for the auxilliary. Turn the main engine hard lock to hard lock to ensure it doesn't touch the auxiliary. Reckon you should be able to move the Honda slightly more towards the sponson so it's clear. If the Honda is long shaft, and it looks like it is, then it should be fine.
My auxilliary engine is long shaft and it clears the water when underway. You can add a ratchet strap from the transom knee or floor (use a stainless steel U bolt as an anchor point) to the auxilliary powerhead to ensure it doesn't bounce about.
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17 November 2013, 15:13
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#13
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Member
Country: UK - England
Town: Northumberland
Boat name: Northern Storm
Make: North Diver?
Length: 4m +
Engine: Yamaha 90 Autolube
MMSI: 235096344
Join Date: Aug 2012
Posts: 546
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Yeah think clearance should be ok, does yours catch water much?
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17 November 2013, 17:09
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#14
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Member
Country: UK - England
Town: Enfield/Switzerland
Boat name: Zonneschijn II/Vixen
Make: Shakespeare/Avon
Length: 7m +
Engine: Evin' 175 DI /Yam 90
MMSI: 235055605
Join Date: May 2006
Posts: 1,436
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Quote:
Originally Posted by Gramas
Now we getting technical haha not sure if mine is ? Can't check till home in few weeks and really don't fancy moving it as bolted
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OK but point is, if your main is offset, put aux in side with most clearance
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17 November 2013, 18:51
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#15
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Member
Country: UK - England
Town: Northumberland
Boat name: Northern Storm
Make: North Diver?
Length: 4m +
Engine: Yamaha 90 Autolube
MMSI: 235096344
Join Date: Aug 2012
Posts: 546
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Do you think once in water and aux fully tilted that it would require a bracket to raise it up more so would not drag
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17 November 2013, 20:19
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#16
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,642
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Quote:
Originally Posted by Gramas
Yeah think clearance should be ok, does yours catch water much?
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No, it clears the water just fine... see for yourself!
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18 November 2013, 00:09
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#17
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Member
Country: UK - Wales
Length: no boat
Join Date: Jan 2012
Posts: 1,012
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Not as exciting as the above vid, but this one also shows no bad effect with direct transom mount.
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