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Old 25 March 2016, 18:45   #21
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Yep running in stage 1 and most of stage 2 complete!

What a superb day... just a bit of a chill in the northerly wind late afternoon but apart from that really nice.

So some proper impressions now...

Instant 1/2 pull start, dead stable idling and clean acceleration. A different type of vibration to the 2-strokes with an almost offbeat feel just above idle (commented on in some tests). Staggering quiet at idle and a nice muted 4-stroke sound at higher revs. Feels very gutsy and has a very sharp pickup from idle.

The "lean burn" ECU controlled mixture operates by giving loads of fuel to accelerate then leaning off as much as possible while maintaing revs for any given throttle opening. In some tests they've commented you can feel this happening and there is an impression having levelled off the throttle that you might be about to slow down so you give it a bit more where it responds with gusto then you have to back off again. I'm being super critical here... not an issue... but after the gutsy through the range 2-stroke it just feels less linear in its power delivery.

Running in (after initial 15mins at idle) is a couple of hours at 3000rpm which gave a just off the plane 6kts and then an hour at 4000rpm which we did most of... this gave an on the plane 12kts. Then we have 7hrs of max revs allowed but only for 5min periods.

We covered 14.6Nm and used 5lit fuel so (thinking of Max's recent thread) 2.92Nm/lit.

There was one panic... about 1.5Nm from shore the engine spluttered and cut out... I looked down at the kill cord as the first possible culprit... still on. So I restarted which lasted all of 5secs. Then it wouldn't go at all. Picked up the tank which felt half full and started to think of where to paddle to!

Then I remembered daughter had put her feet on the fuel tank shortly before and looked more carefully. She'd put pressure on the collar of the tank to fuel line snap-on connector and it had released with the ball valves sealing fuel off... but was hanging on enough to look connected.

Reconnected, primed and off we went again. An outboard stopping at sea always concentrates the mind.

Thank goodness I refused the 12" pitch prop that was on this outboard when it arrived... even the 11" they substituted is a bit high geared with the three adults + dog + 24l fuel + lots of kit. Think I'll buy a 10" and keep this 11" as a just in case holiday spare.

Anyway I've saved the best for last... with a 20mm spacer no transom splash at all! Given all the varied ideas I was considering this year to reduce splash further (with the Mercury) I'm really pleased at this improvement... really really pleased!

Pics... on the hard... running in at 3000rpm displacement... and 4000rpm on the plane.

Edit: The last two pics remind me how much I hate raised transom wheels spoiling the lines of a SIB... but they're so damn useful. Thanks G!
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Old 26 March 2016, 01:23   #22
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Sounds like you had a great day! From where I was sat in Cambridge it looked a prefect day for it...

Glad I'm not the only silly ass that disconnects his fuel line from time to time!
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Old 26 March 2016, 04:42   #23
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Only the second time in a lifetime it's happened to us. Of course if I'd had a choke I'd have fiddled with that!
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Old 01 April 2016, 18:29   #24
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Easiest power upgrade ever today... my 20hp sticker arrived!
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Old 01 April 2016, 19:36   #25
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Originally Posted by Stigomery View Post
Glad I'm not the only silly ass that disconnects his fuel line from time to time!
Oh, it's a sizeable club - welcome!

I eventually taped mine onto the tank...
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Old 07 April 2016, 13:27   #26
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Up date had engine service at ribquest 65 + vat today done at 6 hours for 20 hour or 1 month service to keep warranty up I questioned the 1 month it appears that some manufactures use a lighter oil for running in.
Engine oil and gear oil changed and I was very surprised how dirty both were, I didn't get a print out as their software needs updating to my engine spec (first 25 hp they have done) but no problem I can return for that later.

As a reference they charge 35.00/hour + vat the last cost I got was for a full all singing service tappets the lot at 257.00.
Costs inclusive of parts.


Cheers
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Old 07 April 2016, 15:07   #27
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My supplier quoted a bit less but I reckon when I get to the 20hr he'll probably "remember" his quote didn't include parts, oil or whatever so I'm expecting nearer your figure which seems OK.

Bit surprised the oil in either engine or g.box would be dirty at 6hrs but I wonder if it is a special running in fill that does initially pick up contaminants.

Sadly family arrangements failed to dovetail with weather/tide a few days ago so I missed getting another 3hrs on the meter.

New 10" prop arrived yesterday to augment the 11" my 20hp came with. Genuine Suzuki and like the 11" not nearly as nice a profile as the ones on the Mercury/Mariners I've owned. These Suzuki props look to lean a bit towards a high thrust design. They certainly grip the water though and there's a very marked snap to the action when you open the throttle compared with any other up to 20hp motor I've owned.
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Old 07 April 2016, 16:07   #28
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Re the oil your completely right picking up the sworfe & casting contaminants. Re the props we worked with stone manganese on ship propellers for a while the silence behind them is imence and designed to the engines & hulls so I would say with so many variants on hull design with boats getting the correct prop for each application is not easy.

Che.ers
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Old 14 April 2016, 07:31   #29
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Tank and fuel line upgrade today.

The Suzuki DF20 comes with what I regard as the standard 12l tank which I've had before marked Tohatsu. The Mercury/Mariner 2-strokes came with a 25l tank for anything over 15hp and that's what I'm used to. Of course the Suzuki is more economical but not as good as half the usage so effectively I've suffered a range downgrade.

Thought the answer was to take out a second identical 12l tank I already had but the two of them took up too much floor length. Also the new Suzuki tank didn't have a fuel gauge plus the fuel line is very easily kinked.

So today I've had delivered from Pacermarine a Quicksilver 25l tank with a Quicksilver line ending in a Suzuki fitting (69-95 inc delivery).

As the images show the 25l Quicksilver takes up little more room than one 12l Suzuki tank, it has carry handle stowage for the fuel line plus a built in gauge. Also the fuel line is anti crush/kink compared to the soft Suzuki one and the connection to the tank is far better protected compared to the Suzuki type that only needs a nudge on the spring collar for it to disconnect.

With hindsight I should have twisted the dealers arm to swap the tank on collection day for a 25l at no/minimal cost.
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Old 14 April 2016, 12:23   #30
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Could you not piggie back the 12 onto the 25 for long range couple of bits of foam to rest on and strapped up.
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