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Old 14 May 2008, 01:20   #11
Country: UK - England
Town: Essex/Vendee
Boat name: shockwave,Voluntry 2
Make: Pac 22/ searider5.4
Length: 6m +
Engine: 180hp turbo,yam 90
Join Date: Nov 2004
Posts: 1,010
Originally Posted by Mollers View Post
In a similar way that a Ssang Yong is a re-badged Mercedes.
The 2 stroke i am looking at is definatly mostly Selva but does share a few parts from Johnson.If it was mostly yam like the 4 stroke i would definatly bought it but then so would 400 others as well

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Old 14 May 2008, 12:54   #12
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Originally Posted by John Kennett View Post
That would depend on whether a Ssang Yong has "Mercedes" stamped on it when you lift the bonnet. I looked at a Selva 115hp 4-stroke a year or so ago and the only difference between it and the Yamaha was the white cowl and a few hundred quid . . .

The ones I looked at didn't even have white cowls - they were Yam bluey-grey with 'Selva' decals. The F100 Yam was around 1k more at the time

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Old 15 May 2008, 16:35   #13
Country: Germany
Town: Stuttgart
Boat name: Boat
Make: Avon,Scorpio,535 She
Length: 5m +
Engine: Yam 75HP,Johnson 70
Join Date: Jan 2008
Posts: 133
tomorrow i `ll travel to Italy.
They like the cars they build, they like the wine and food they make, but you will see only a few with selva engines at the transom. The elder 2 strokes are very rough and soak the gas, but never heard of break down.. The actual models might be a co production Yamaha or Tohatsu. Look at both and the cast numbers and sign inside, also electrical equipment,
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Old 30 October 2008, 17:09   #14
Country: France
Town: Cannes
Boat name: midkat 550
Make: apoge
Length: 5m +
Engine: 2x50 Tohatsu
Join Date: Jan 2008
Posts: 126
Sorry sirs, but I have to disagree with most of the above negative statements !

The 2 stroke Selva - LPDFI = low pressure direct fuel injection - has been developped during maby years with a cooperation between the french ELF and italian Selva.

It doesn't use the same ideas than Tohatsu, Mercury or Evinrude with their injected motors, but another.

The intaken air is compressed into the crankcase like all the 2 strokes, but partly diverted and stored under-pressure in a small tank which is part of the crankcase, then mixed to the gasoline coming from a pressurizing pump and sent to the head through a valve controled by a camshaft.
More or less, it works like the low-pressure spray-painters.

This saves the mechanical compressor (see Tohatsu and Optimax) and it is very efficient, with MPG figures better than the best 4 strokes .
The ECU controls the operations and allows the right amount of gas to be sent.

The 80hp is very light (120kg, more or less that of a 2stroke-90 Yam, or a 50/60 Merc, or 50 Suz) and displays the 2-stroke typical high torque figure at low RPM, which makes the big difference with 4 strokes engines.

Running is very smooth, not as quite as a 4 stroke indeed, but low weight and high power/torque fit perfectly the present mid-size ribs.

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