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Old 06 January 2012, 03:08   #11
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Hi

i would hear the honda running before rulling it out, yes it is air cooled but this has been a plus and the noise never a problem when you hear other engines side by side.

The only downside for me is that Honda's always come with everything and the longest warranty but oh no. This engine comes in at 12.5kg for the short and 13.5 for the long but it does not come with a carrier/ shoulder bag! This is amazingly classed a an extra.

so as the mercury , mariner and Tohatsu's are the same for small engines the Tohatsu is also worth a look.
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Old 06 January 2012, 08:27   #12
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i would hear the honda running before rulling it out, yes it is air cooled but this has been a plus and the noise never a problem when you hear other engines side by side.
I used to have a 2HP air cooled Honda and at full throttle it was at least as noisy as my 20HP Yamaha 2 stroke... ...its not a pleasant noise either - but there are some advantages for canal running such as not having to worry about weed / plastic bags blocking the cooling water intake. I imagine the plastic prob and centrifugal clutch would also go a long way to protecting the gearbox from a shopping trolley strike. On the other hand transportation / storage of 4 strokes is a pain and I found that between this and extreeme sensitivity to angle of orientation when topping up the oil (to get it level in the sight glass) it would smoke more than a 2 stoke until it had been running for a while.

The Tohatsu 9.8 is a well liked engine. The only real benefits I can see from a small 4 stroke would be: lighter weight - but the tohatsu is not that bad; better fuel economy - but its not going to be a huge difference in terms of total litres per annum, possibly less likely to foul plugs on the 4 stroke - although I think that is possibly exaggerated from the old days of premix, and "add a bit extra oil to be sure", its also not the end of the world in a canal. Does that justify it compared to having a second engine to insure, maintain, winterise, etc?
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Old 06 January 2012, 10:21   #13
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Hay Palwart

when am I servicing the honda? that sounds far to noisey compared to the one we serviced last week.

Dave

ps you can always drop it off at my place and grab a coffee as I am only in gartcosh
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Old 06 January 2012, 12:09   #14
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Dave,

I flogged the Honda a while back. It doesn't fit on the back of this boat beside my main engine so was no longer useful.
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Old 06 January 2012, 17:39   #15
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you are still welcome to pop round for a coffee!
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Old 06 June 2012, 03:58   #16
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Just thought I'd update this thread. I've used the Tohatsu 9.8 on my SIB and can report that it works fine at low speeds on the canal. We went out for about 3 hours at speeds of 2-4mph which is pretty low RPM.
The engine did not complain at all, and the noise it makes is just a fairly quiet humming, in my opinion no worse than my previous engine, a Mariner 6hp 4-stroke.
The Tohatsu has a rubber damped/mounted power head so vibrations are not transmitted to the tiller which is better than the Mariner, which made my hand go to sleep after a couple of hours.
At higher RPM the engine just hums and I imagine it will be easier on the ears when planing as well, not tested this on the canal of course.
I'm guessing that this is due to the Tohatsu being a twin cylinder engine as much as anything.
Oh and the fuel quantity in the tank hardly seemed to drop at all with 3 hours trolling.
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Old 07 June 2012, 18:32   #17
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Just thought I'd update this thread. I've used the Tohatsu 9.8 on my SIB and can report that it works fine at low speeds on the canal. We went out for about 3 hours at speeds of 2-4mph which is pretty low RPM.
I have used my Yamaha 8hp 2T twin on a Zodiac. Nearly always WOT after warm-up.

It's now powering a displacement boat with a finer pitch prop. Running 10-20% power. Am thinking about changing spark plugs to a different temperature range, to avoid oiling the plugs. Might be helpful if the oiling becomes an issue for you.
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Old 08 June 2012, 03:51   #18
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I'll see how it goes, currently running in on 25/1 premix so it smokes a bit, should be better when I change to 50/1
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Old 08 September 2014, 18:16   #19
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Two years down the line and still using the Tohatsu 9.8, which is currently fitted to my friend's Honwave SIB.

The boat is kept in Anglesey, at my friend's caravan site.

It is hard to fault this engine, in its' class. Just a shame it can no longer easily be bought new in the UK.

It started second time this year after being sat in the garage untouched all winter. I'd recommend this engine for any small boat where you have to manhandle the engine on and off.
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Old 10 September 2014, 04:25   #20
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Tohatso makes all smaller engines for Merc. I'm using a merc (2004) 9.9hp and it pushes my 14' Seamax beautifully. Have had two other adults onboard and it still reaches plane easily. I keep my type 31 Battery, 55 lb thrust electric and 6 gallon fuel tank at the front to balance weight making the boat jump on plain fast as well as keeping the bow down.
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