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Old 10 June 2016, 12:35   #41
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Now the engine is starting to loosen up David the fuel consumption improving making the cross over worth it.
See what you mean by kit not much space left.

Cheers
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Old 10 June 2016, 14:21   #42
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With that consumption David this could be the new must have SIB engine. Being in the situation of always wanting a little more than the 15 will give and therefore buying a 25 to trial alongside my 15 and with my 15 only averaging 1.8 NM's/l (goodness knows how much the 25 will guzzle) and with the 25 being 50 odd kg then the Suz is a great compromise.
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Old 11 June 2016, 05:17   #43
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Reading all this and having my own expearence with my 25 Suzuki I think the 20 and the aerotec is about as good as it gets for performance , portability & fuel consumption .
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Old 11 June 2016, 06:44   #44
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>>>about as good as it gets for performance , portability & fuel consumption.

Certainly for our current use Jeff.

I've grown to appreciate the slight eco advantages of a 4-stroke and very much appreciate the flexibility of offloading unused fuel into the cars so I'm always running on fresh.

But having said that if I was mostly one up or self plus single crew up to 10st my Mercury 15 2-stroke made for a great lively combo too. There was something very right about that setup looks and performance wise.

On our usual days out there is little time for experimentation but in August when we are based yards from a slip for two weeks it will be interesting to try different weight/crew combos with my 10/11" prop alternatives.

Also Chipko commented the other day (same outfit as mine) even if the Suzuki 20 is pretty well splash free with a minimal transom block the AV plate is still too deep in the water for best efficiency when on the plane... so that's something I will look at while on holiday.
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Old 11 June 2016, 07:05   #45
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That's the beauty of two weeks away you should get it bang on.

I think I was lucky with my set up I stuck the engine straight on the transom cav plate in line with the keel on the transom but just above the keel when its blown up two inches toward the bow if that makes sense it kind of steps up an inch to the transom and up to now I think I am getting 22 kts as a WOT speed as a norm that's plenty for me and it's got to be like glass for that speed. Fuel wise I've not done any real trials but up at ERR 3 days and 7 hours of running for 25 l of fuel.
Prop tests next time out for a spare prop.
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Old 27 June 2016, 05:20   #46
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At last... run in with 10:18 hrs recorded.

Another 15Nm on Friday with brilliant dry weather but challenging** conditions after lunch for the return trip.

Fuel overall 0.35l/Nm. First leg 7Nm on the plane at an economical 16kts cruise. Return leg an exceptionally difficult 8Nm on and off the throttle every few seconds from 8-13kts.

So as an average that seems a reasonable consumption. Glad I bought the larger 25l tank as using the thirds rule it will give us a safe range of around 50Nm.

With a combination of being run in, changing from 11" to 10" pitch prop and using premium unleaded the motor seems a fair bit smoother than on our first trip out. You could say it's just me getting familiar with it but I don't think so.... I think there's a real improvement.

As our next major outing is two weeks near daily use in Scotland in about 5wks my choice will be to take it early for its first 20hr service now its topped 10hrs. So I'll soon be able to report where my guy ends up on pricing.

**The return conditions from our lunch destination really were very difficult... after heading out for about 10mins I started to consider going back in and taking a 40min taxi ride to collect the car and recovering at the lunch spot.... but then I thought of the taxi cost and extra slip fee being about 50... as long as we were safe we had to battle the conditions to save that. My concern was not comming to grief but badly frightening Mrs Fenlander and our daughter plus shaking up the dog. Thankfully Mrs F and dog were untroubled but daughter did start to feel seasick about halfway back... thankfully she held on OK!

An interesting experience.
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Old 27 June 2016, 05:33   #47
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Very jealous of your consumption - our trip Saturday was 24nm, mostly full on wave jumping or WOT, consumption 1.9nm litre. I know you post yours the other way (how many litres it takes you to do a nm) which I can't get my head round...
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Old 27 June 2016, 05:48   #48
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>>> I know you post yours the other way (how many litres it takes you to do a nm) which I can't get my head round...

It's just how Suzuki published their consumption test results and I've taken it on board. But I guess the important comparison is that with our 25l tanks you'd have a safe range on the thirds rule of about 32Nm to our 50Nm.

Just as a matter of interest I'm getting the consumption pretty accurate by weighing the tank before/after.


>>> mostly full on wave jumping

With two heavier adults plus teen, dog, too much kit and heavier outboard we don't so much wave jump but part them! However on the three or four occasions when I reckon there was pretty much just the transom and prop in the water there is little danger of being blown over backwards with our load... but the landing moves a lot of water!

The conditions would have been huge fun if out with just one like minded fearless crew... but wife/daughter/dog does concentrate the mind a bit.
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Old 27 June 2016, 06:07   #49
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Suzuki DF20AS EFI - Impressions and review.

Glad to hear you've run in the Suzuki and consumption sounds good.
Not sure what LPM we get, but out this weekend we used slightly over 10l for a total actual engine run time of just under 6hrs (including15mins flushing in bucket). Time spent hooning around the bay solo trying raised transom heights, so lots of time near WOT and full throttle hole shots while hanging out over the transom.
Always amazed at fuel consumption on the Suzuki even when towing....the EFI seems to provide both great performance and economy.
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Old 27 June 2016, 06:20   #50
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Did you come to any conclusions re the ideal transom height for the Suzuki?
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