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Old 07 July 2022, 01:13   #1
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Country: Australia
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FC470 40hp or 50hp

Gíday All,

Iíve recently acquired a FC470 and being the FNB of inflatables would appreciate some advice.
Iím in Australia where it appears the options for new short shaft tiller outboards is fairly limited in the 40-50hp range. Yamaha do a 40 and Tohatsu do a 50 in a 15Ē shaft. My transom measures 15.5Ē at the centre.
Iíll be using the boat in rivers and the ocean, 50lts fuel, 2 POB, large dog and some diving/camping gear +/-360kgs or 800lbs.
Thereís are $2k price difference between the 2 motors and would appreciate some input on whether there will be some tangible advantage with the 50 vs 40. Iíd like some extra hp in the back pocket of its useable.
Advice on whether the 15Ē shaft is a close enough fit to the 15.5Ē transom height would also be welcomed along with any other ideas/thoughts from those with more experience than I might have would be greatly appreciated.
✌🏻👍🏻
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Old 07 July 2022, 02:45   #2
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Unless itís a really old 470, it should be a 20Ē long shaft.

As for HP, 50 would be great!
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Old 07 July 2022, 07:23   #3
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Hi SoCal, I did a search on the serial number and the report indicates in a ex Aussie airforce boat manufactured in 2014. Unfortunately I can download a photo of the transom
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Old 07 July 2022, 07:29   #4
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5th time luck
Attached Files
File Type: pdf Photos-export-07-07-2022-152754.pdf (517.9 KB, 15 views)
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Old 07 July 2022, 07:35   #5
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I'd go 50 and get down the gym to do some bicep curls.
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Old 07 July 2022, 08:08   #6
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Quote:
Originally Posted by Matt View Post
I'd go 50 and get down the gym to do some bicep curls.
Haha Iíve signed up 👍🏻💪🏻Cheers
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Old 07 July 2022, 16:41   #7
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Thatís a short shaft transom. Havenít seen those in a while. At least you got a newer boat!

If shaft length is an issue, you can build up the transom and then cover it with an aluminum cap. Scribe out a piece of lumber and use some dowels, long screws and wood glue to hold it in. Then add the cap. It will be very strong and take you up to a long haft. Another benefit of this is less water splashing into the boat.

With a short shaft, I think youíll need to keep below 40HP. Perhaps also add an anti cavitation plate (whale tale).

The Aussie/British zodiacs are pretty cool. Iíve always liked the color.
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Old 09 July 2022, 23:35   #8
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Ok cheers I was reading a few posts about the spray issues. Iíll do some more research thanks.
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Old 10 July 2022, 22:57   #9
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Click image for larger version

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Old 10 July 2022, 22:58   #10
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Here is the same boat (I presume) with the standard transom. Itís the FC470 with the Evinrude 55MFE.
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Old 11 July 2022, 11:28   #11
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Quote:
Originally Posted by SoCal Hurricane View Post
Here is the same boat (I presume) with the standard transom. Itís the FC470 with the Evinrude 55MFE.

Nice rig! 👍🏻
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