2008 honda 10hp 4 stroke

bigscott · 08 August 2013, 18:55

Hi guys.

Ive been offered a honda 10hp 4 stroke 2008 in perfect condition for £1200. I know hondas are excellent outboards but not sure if the price is right? Is it too much or should I snap it up??? Any advise most welcome .

lightning · 11 August 2013, 13:38

Well, the Honda BF 10hp is about £2200 new so if it really is in mint condition and you want a10hp outboard then it is a big saving.

bigscott · 11 August 2013, 13:52

Hi lightning I took the plunge and bought the outboard yesterday. Very happy with it. Took it out this morning and it runs like a dream.

lightning · 11 August 2013, 16:31

Great! Being a Honda it will probably still be running in the year 2050.
What boat are you using it with. And how heavy is it to carry?

Did you test it for maximum speed?

bigscott · 11 August 2013, 16:49

Its on a bombard 380 mate. Its a replacement for my 25 Mariner 2 stroke. The honda runs on fumes compared to the 25

Theres a big drop in power from the 25 ( as expected) but im happy.

It weighs around 43kg my only gripe is it kicks up a LOT of water over the transom. I remember reading somewhere on here that its easy to stop with a bit of teaking and very common on the bombard. Will search for the thread

lightning · 12 August 2013, 07:23

I had that issue with my Tohatsu 9.8hp.

I cured it by raising the engine 2cm on the transom with a block of wood, also set the engine trim on position 4 rather than 3 (so a bit further out from transom)

bigscott · 12 August 2013, 07:42

Ahhh thats a nice easy fix right there thanks lightning. Will make a riser block at work today ready for tomorrow evening. I did think about changing the trim yesterday but the current was ripping over the slipway so decided against it.

lightning · 12 August 2013, 07:54

How far below the keel is the anti cavitation plate on the engine?

It should look something like this, at least as a start point before trying any adjustments to engine height.

bigscott · 12 August 2013, 08:52

No idea will check when I get home tonight.

Stupid question - does the keel have to be bang on in line with the anti cavitation plate?

lightning · 12 August 2013, 18:26

I am led to believe it should be four or five cm below the keel at the back of the boat, as in the picture I posted above.

Max... · 12 August 2013, 19:28

Bigscott, just do a search for posts by 'locozodiac' - he's the master of SIB OB height optimisation and has posted loads of pics on the subject.

You need to go out on a calm day with a tach, a GPS and various raiser blocks doing some fine tuning.

Start here:

http://www.rib.net/forum/attachment....6&d=1369529240

http://www.rib.net/forum/f50/futura-...tml#post550314

lightning · 13 August 2013, 08:33

Yes you do need to experiment with your own boat/engine.

I found that with the smaller plate level with the keel (as above) there was a lot of splashback into the boat, no matter what I did with the engine trim.

A block of wood under the engine mounting cured it completely, although it only raised the engine less than 2cm.

So that's why my picture showed the engine slightly higher. But I have the Tohatsu 9.8 two stroke which is known, I am told, to suffer from splashback. I never needed a riser block with my previous engine.