Tohatsu 6hp, or 8hp 'Sail Drive'

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HappyHurley

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The 6 is a single cylinder 123cc motor, vs. the 8 which is a 2 cylinder 209cc. Weight is the biggest issue for me, 25kg vs. a whopping 37kg for the 8hp cylinder.

Application is a Hurley22, in a well.

I'm wondering if the 6hp will have enough 'ooomph' for what is a fairly heavy 22 footer ?

Current engine is a elderly 7.5hp Evinrude 2 cylinder, which'll just about get the boat out of Portsmouth on a flooding Spring tide.
 
Your 7.5 'rude must be 1983 or earlier and will therefore be rated by the power at the crankshaft not at the prop as has been done since 1983. It probably equates fairly closely to a modern 6 hp. (in fact a quick look at the parts lists suggests that the 1984 6 hp is the same as a 1983 7.5)

You dont give the model number so I cannot tell if yours is a "sail" version or not. AFAIK it was not an option before 1982

I reckon therefore that you should find a modern 6hp "sail" version marginally better than your old 7.5. At least as good if it is also a "sail" version

I have a 6hp Evinrude Yachtwin on a 19ft boat, it's more than adequate for that. Pushed me out of Portsmouth against the flood tide anyway!

Have you studied the weights of brands other than Tohatsu? You may find an 8 about the same weight as a 6 in another brand.

Check what ever you buy will fit the well!
 
The Evinrude is definitely 'vintage', although runs perfectly. It has a charging coil, but I'd need to check the model this evening.

Any suggestion beyond Tohatsu/Mariner [not sure I want to spend Yamaha money though] ?

And as an aside, any idea what the Evinrude would be worth in PX ?
 
Not looked at buying a new outboard recently so out of touch with the current market.

A decent Evinrude 7.5 ought get a decent price if sold but I doubt you'll get anything like its true value traded in. Do better selling on ebay possibly. You'd get a good price for it in the USA, I bet. They run these old 'rudes for donkeys years, and if its a 1970's model would probably do better than a 1980s model.
 
I use a Tohatsu 6hp sail drive on my Hurley 22. I don't think I'd like anything heavier as I find 25kg just about manageable. The engine has sufficient power with some in reserve should I need it. Economical as well
 
If it helps, I've got a Sasanka 660 (22ft 1.5 tons) driven by a 5hp tohatsu saildrive (2007 model).
It's excellent when manourvering - as long as the prop is deep enough (I put the cantilever bracket on the lowest setting when going slow).
Flat out in calm water drives her at 6.5knots, but I don't think the outboard is pulling full revs. One day, I'll have a go with the normal size prop that came with it to see what difference it makes.

A couple of summers ago, we towed a very heavy 25ft'ish wooden boat up the Dart (he had gearbox problems) at 4 knots. The force on the rope was incredible and I had to double it around the winch for fear of snapping off the cleat - Lots of pulling power!


Cheers
Paul.
 
@VicS: Model is E8BA LC1C
Click to expand...

E8BALCIC:
Evinrude, 7.5hp, Made in Belgium, fitted with an AC lighting coil, longshaft (20"), 1981.

Only one prop was offered 8½" x 9". Sail versions in 1982 & 83 were offered with a 9¼" x 6½" high thrust prop as were the later 6hp and 8 hp models. (Sail versions also had a special longshaft extension that allowed the prop to be mounted deeper, without increasing the exhaust backpressure, and an exhaust outlet that did not affect the thrust when going astern)

I reckon if your '81 7.5 is just about good enough then you'll find that a modern 6hp sail drive model should give you a useful bit extra push although I have not been able to find out what props are fitted to the Tohatsu other than it being described as "high thrust".
I notice that they also include battery charging as standard although I expect your Evinrude has been fitted with it as an accessory.
 
I use a Tohatsu 6HP saildrive on my Hurley 22 and it pushes the boat along fine at 5 knots. It's a bit of knack starting it through the little hatch but OK when you get the hang of it. My only critiscism is that the charging coil doesn't seem to have much oomf to it but I'm hoping to build a little switch mode gizmo to get more volts out of it but obviously at the expense of some current. I expect I'l post about that when I remember to build it.
 
did you ever do this Ed

EdBeynon said:
I use a Tohatsu 6HP saildrive on my Hurley 22 and it pushes the boat along fine at 5 knots. It's a bit of knack starting it through the little hatch but OK when you get the hang of it. My only critiscism is that the charging coil doesn't seem to have much oomf to it but I'm hoping to build a little switch mode gizmo to get more volts out of it but obviously at the expense of some current. I expect I'l post about that when I remember to build it.
Click to expand...

just came across this thread

did you ever do this Ed?
 
EdBeynon said:
I use a Tohatsu 6HP saildrive on my Hurley 22 and it pushes the boat along fine at 5 knots. It's a bit of knack starting it through the little hatch but OK when you get the hang of it.
Click to expand...
I use a technique for starting my Tohatsu which reduces the effort required and gives a smoother pull.

I'll try videoing it as it's hard to describe.
 
Here is a new Lakesailor production.
Don't know if this could make your motor starting easier, but I find it very helpful.


(Hm. The display image could be misconstrued) :eek:



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