Outboards 2009 - HP, Weight, Make Comparison

[rwatson]

Just did a chart of motors between 20 and 150 hp, with weights, by make. Thought I would upload it in case anyone is interested.

[ririzarry]

Very helpful...

Thanks,

Rob

[Fanie]

Interesting to note up to a 60hp the weight remains relative low, then it shoots up by quite a bit. The remaining factor to consider is the price...

[rwatson]

Originally Posted by Fanie

Interesting to note up to a 60hp the weight remains relative low, then it shoots up by quite a bit. The remaining factor to consider is the price...

Wish I could get some prices - they seem to be "secret distributor business".

Varies so much from country to country too

[Fanie]

I hear some good things about these Tohatsu motors.
Some prices under the specification tabs here - in US$
http://www.tohatsu.com/outboards/index.html

[rwatson]

Originally Posted by Fanie

I hear some good things about these Tohatsu motors.
Some prices under the specification tabs here - in US$
http://www.tohatsu.com/outboards/index.html

I just put the Tohatsu specs on that chart.

You are right, they have a very good weight/power ratio at least

[Itchy&Scratchy]

I may be wrong here, but I think Tohatsu are made by Yamaha.
J

[mwatts]

Originally Posted by Itchy&Scratchy

I may be wrong here, but I think Tohatsu are made by Yamaha.
J

No Yamaha's lower end brand is Selva. Tohatsu's are built by Nissan. I don't know if they are 1:1 the same though.

@RWatson: Did you compare identical motors? Because long shaft / short shaft, tiller / no tiller, powertrim yes / no, dryweight or ready-to-run all make a difference in weight. Otherwise it's like comparing apples & pears.

For instance, if I look up the 2009 specs for a Yamaha F20B, I see it weighs 51.7 Kgs, not 61, and an F30 83.8 Kgs, not 99.

Are the Tohatsu's in the chart the 4-strokes or the 2-stroke Direct Injected (TLDI) engines?

[rwatson]

All the 20 hp are the same weight with prop, and they *are* 61 kg There are four F20B models, and they all weigh the same,. Weight is quoted as Weight (kg) with prop. 51.7 ~ 60.7 , which I take means around 51-61 kg, so I pick the highest

http://www.yamaha-motor.com.au/marin...htm?marine.asp

Yamaha 20 HP (4 Stroke)
Model Weight with prop (kg) Transom Height MM
F20BEPL 60.7 508
F20BEHPL 60.7 508
F20BMHS 60.7 381
F20BMHL 60.7 508

There are 4 F30's quoted (not one) and the weights are not 83.8 kilos
http://www.yamaha-motor.com.au/marin...htm?marine.asp

F30BEHTL 104 536
F30BEHTL 104 536
F30AEHTL 95 533
F30AETL 90.4 533

so the average weight is 98.35 (99)

There is no quoted dryweight V "ready to run" figures I can see, unless you add the Oil Pan Capacity (2 litres) which is just nit picking. Tiller arms are not significant.

You have to assume powertrim is within the maximum weight for the small engines, and standard on all engines over a certain size ( maybe thats why the jump in weights over 30, and weight range for the low enders)

All updated figures with web site addresses and features are welcome though. I am happy to check all figures in the chart as it makes it more usefull to everyone

[tom28571]

The main thing you point out with these charts is that it is wise to look at the actual specs of motors rather than listen to general beliefs on the weights and power of outboards. Some 4 strokes are heavier than 2 strokes of the same "rated" power by only a couple percent.

What the actual developed HP of these engines is, is not often known so accuracy of comparisons suffer.

Mid power range Suzuki 4 strokes are much heavier than their counterparts from other manufacturers. They are also much higher displacement than their counterparts so do we trust the power ratings? A Suzuki 60 is over 45% heavier and 25% greater piston displacement than other similar engines. This does not look reasonable. Apparently the Suzuki is highly detuned and derated. Where weight is not a factor, the Suzuki 60 looks like a rugged engine.

[rwatson]

Originally Posted by tom28571

rather than listen to general beliefs on the weights and power of outboards.
.

Hmm, can we not trust the facts quoted by manufacturers ? They get validated by lots of different people. I wouldnt have thought they would fib much.

Originally Posted by tom28571

Some 4 strokes are heavier than 2 strokes of the same "rated" power by only a couple percent. .

yes - whats the point you want to make ?

Originally Posted by tom28571

What the actual developed HP of these engines is, is not often known so accuracy of comparisons suffer..

I really am not sure what you mean by this. Could you explain more please ?

Originally Posted by tom28571

Mid power range Suzuki 4 strokes are much heavier than their counterparts from other manufacturers. They are also much higher displacement than their counterparts so do we trust the power ratings? A Suzuki 60 is over 45% heavier and 25% greater piston displacement than other similar engines. This does not look reasonable. Apparently the Suzuki is highly detuned and derated. Where weight is not a factor, the Suzuki 60 looks like a rugged engine.

No - its only the 60 that is "much heavier"
The Suzuki 60 is 1298cm Displacement, and weighs 160 kilos, way over comparable motors. I cant think of when weight isnt a factor, but I would be interested in how the weight makes it more rugged. I have no experience with that engine.

The reverse is true for the larger powered motors

for example

Suzuki
DF 90A/80A/70A 4 Stroke
Multi point Sequential Electronic Fuel Injection
Maximum Output: 90hp (66.2kW) / 80hp (58.8kW) / 70hp (51.5kW)
Cylinders: In-line 4
Displacement: 1502cm3 (91.6 cu. in.)
Weight kg: L: 160
X: 164

Yamaha
NEW F80BETL (4 Stroke)
Engine Type 16-Valve Direct Action Inline 4 Cylinder
Displacement cm³ 1595
Bore x Stroke (mm) 79 x 81.4
Output (hp) 80
WeWeight (kg) with prop. 172 ~ 181

Here the Yamaha has a bigger displacement than the Suzuki, and weighs more. It looks like the Suzuki 60 is just a detuned 90/80/70 . is this better or worse ?

All thoughts appreciated.

[mwatts]

Originally Posted by rwatson

All the 20 hp are the same weight with prop, and they *are* 61 kg There are four F20B models, and they all weigh the same,. Weight is quoted as Weight (kg) with prop. 51.7 ~ 60.7 , which I take means around 51-61 kg, so I pick the highest

No, it doesn't mean they all weigh same. It means Yamaha has been a bit lazy, and the short-shaft manual-start 20HP weighs 51.7 Kgs, and the long-shaft electric-start with tiller 20HP weighs 60.7 Kgs. Quite a big difference for motors this size.

Originally Posted by rwatson

There are 4 F30's quoted (not one) and the weights are not 83.8 kilos

Yes, you're right about that.

Originally Posted by rwatson

Tiller arms are not significant.

Look at these two engine's:

Model Weight
F30AEHTL 95
F30AETL 90.4

The difference (the 'H') is the tiller handle. It apparently weighs 4.6 Kgs. I think that's significant.

Originally Posted by rwatson

All updated figures with web site addresses and features are welcome though. I am happy to check all figures in the chart as it makes it more usefull to everyone

You're doing a good job.

[Fanie]

The difference (the 'H') is the tiller handle. It apparently weighs 4.6 Kgs. I think that's significant.

Seems the 'H' stands for handle. There's probably a steering in that tiller for that weight

[rwatson]

Originally Posted by mwatts

Model Weight
F30AEHTL 95
F30AETL 90.4

The difference (the 'H') is the tiller handle. It apparently weighs 4.6 Kgs. I think that's significant.

4.6 kilos significant ?????

Come ooooooon!.

You will be carting more beer than that - just put it in the cooler up in the bow!!!

[Wynand N]

Originally Posted by Itchy&Scratchy

I may be wrong here, but I think Tohatsu are made by Yamaha.
J

No Yamaha's lower end brand is Selva. Tohatsu's are built by Nissan. I don't know if they are 1:1 the same though

.

Wrong on both counts Perhaps as a Tohatsu dealer I can shed some light on these magnificent motors...

Tohatsu is build by Tohatsu who incidentally is the biggest and oldest outboard engine manufacturer in Japan. In some markets the Tohatsu is marketed as a Nissan and this may come as a shocker to those believing in the American dream. All Mercury's two stroke engines from 50hp down to 2.5 are built by Tohatsu and are just badge engineering. Mercury's four stroke are build by Tohatsu.

I will be more than happy to supply spec/data on the engines when asked since I have everything at hand as a dealer.

As a sidenote; due to the high engine power/weight ratio and reliability of Tohatsu, they are the engines of choice in the ZapCat and Thundercat international surf racing classes...