two stroke hypocrit

[Searush]

until 1978 (??) 10:1 was the standard fuel mix. Then 25:1 and some very late ones, of which none may survive, 50:1

post 1967 they can be converted to 25:1 but not advised for early models.

Conversion involves a new needle for Villers carbs or new jets for Amal two jet carbs.


Its all on the SOS website.

Cheers, Vic, slip of the keypad.

 

[Iliade]

'delusional people with huge fragile egos'...

Excellent.

Surely that's thread drift towards those proposing the MCZs?

 

[Seven Spades]

You can still buy 2-stroke engines inthe channel islands legaly, but it is not legal to bring them back to the UK. The problem is that the dealers in the channel islands source from the UK, so they don't actualy have any.

 

[ghostlymoron]

Most can be converted to 10:1 if you wish.

My 1965 seagull was originally 10:1 but after reading the info on SOS I adjusted it down to 20:1 without changing the needle. I did try swapping the needle and reducing the mix to 25:1 but it wouldn't run happily at that. I only use it infrequently as I prefer to use oars for short trips and am happy doing so. I think the contribution to pollution is negligible as the oil seems to be rapidly dispersed in a tidal lagoon and, as the engine is now 48 years old, the pollution, energy costs and raw material usage is spread over a very long period.

 

[Searush]

My 1965 seagull was originally 10:1 but after reading the info on SOS I adjusted it down to 20:1 without changing the needle. I did try swapping the needle and reducing the mix to 25:1 but it wouldn't run happily at that. I only use it infrequently as I prefer to use oars for short trips and am happy doing so. I think the contribution to pollution is negligible as the oil seems to be rapidly dispersed in a tidal lagoon and, as the engine is now 48 years old, the pollution, energy costs and raw material usage is spread over a very long period.

Even the millions of gallons of crude oil from the Torrey Canyon & the Braer dispersed in a year or two . . .

Millions of Seagull users would take thousands of years to accrue that amount of pollution & even if it was all dumped in one go it probably wouldn't be as harmful. It's a big ocean and a teaspoon of highly volatile petrol & oil is soon broken down.

 

[VicS]

My 1965 seagull was originally 10:1 but after reading the info on SOS I adjusted it down to 20:1 without changing the needle. I did try swapping the needle and reducing the mix to 25:1 but it wouldn't run happily at that.

I changed the needle but found it 4-stroked until I screwed the adjustment down about 3 turns below the "standard" setting of flush with the top of the piston. I have probably ended up with it very slightly lower that the lowest they recommend .
Thats my 1974 Featherweight which I use on the tender.

I also converted the 1973 40+ but I have not really used it since the conversion.

 

[ghostlymoron]

I changed the needle but found it 4-stroked until I screwed the adjustment down about 3 turns below the "standard" setting of flush with the top of the piston. I have probably ended up with it very slightly lower that the lowest they recommend .
Thats my 1974 Featherweight which I use on the tender.

I also converted the 1973 40+ but I have not really used it since the conversion.

Thanks Vic I'll try that when I do its annual 'service'. Mine's a Featherweight too.

 

[VicS]

Thanks Vic I'll try that when I do its annual 'service'. Mine's a Featherweight too.

It took a long while to get the adjustment right... not possible in a test tank.. had to do it out on the water. Try it, tweek it, try it again etc.

It's still a little bit of a compromise. There is still a tendency to 4-stroke but if I lower it any more I have to run for longer with a bit of choke