Ariel Posted June 29, 2023 Share Posted June 29, 2023 Is it possible / advisable to turn the carburettor through 180 degrees so that needle assembly points upwards when the motor is inverted? Something I'm working on mostly to learn Fusion 360 but if it were ever to leave the drawing board it would be handy to be able to adjust the mixture from above and also put the linkage in a better place. This is a Laser 70 but is the same applicable to other single cylinder Laser engines? Thanks. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted June 29, 2023 Share Posted June 29, 2023 It's on a round tube, it will work whatever way it is. Quote Link to comment Share on other sites More sharing options...
Chris Walby Posted June 29, 2023 Share Posted June 29, 2023 (edited) The important thing is tank to carb orientation (which ever way around the carb body is, does not matter). Tank the wrong height...might as well drink a pint of castor Edited June 29, 2023 by Chris Walby 2 Quote Link to comment Share on other sites More sharing options...
Ariel Posted June 29, 2023 Author Share Posted June 29, 2023 That's what I thought and also what I wanted to hear. Thanks. The only reason I asked was because the position of the inlet nipple will move and whilst it feels like it shouldn't be a problem, it's better to ask now than start hacking a model around later to get the tank in the right place. Issue resolved Cheers. Quote Link to comment Share on other sites More sharing options...
Jon H Posted June 29, 2023 Share Posted June 29, 2023 the position of the inlet nipple is not important as the centre of the carb remains in the same place 1 Quote Link to comment Share on other sites More sharing options...
Ariel Posted June 29, 2023 Author Share Posted June 29, 2023 Thanks everyone. Appreciate you taking the time. 1 Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted June 30, 2023 Share Posted June 30, 2023 As long as your fingers don't get burnt making any adjustments 😉 Quote Link to comment Share on other sites More sharing options...
Ted Khinsoe Posted July 4, 2023 Share Posted July 4, 2023 They do bite and bite hard. Tuning my 70 and the thing didn’t even stop! Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted July 4, 2023 Share Posted July 4, 2023 51 minutes ago, Ted Khinsoe said: They do bite and bite hard. Tuning my 70 and the thing didn’t even stop! Turning while it's running, are you going for the Darwin award ?. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted July 4, 2023 Share Posted July 4, 2023 Odd. I thought that was the way we all do it? Any other method would be extremely long winded. As long as any contact is with the back edge of the prop, you should only get a literal rap on the knuckles with no bloodshed. However, not the case with a pusher prop and you won’t find me within two inches of one of them. I still have the scars inflicted by a little Veco 20 from the mid seventies to remind me! Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted July 4, 2023 Share Posted July 4, 2023 And your memory Veco made a .19 and a .21,,,, Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted July 4, 2023 Share Posted July 4, 2023 It was originally a .19 but bore wear had taken it out to .20 😜 2 Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted July 4, 2023 Share Posted July 4, 2023 I had the .19 in a Mardave Stock car, I was starting by using my finger on the flywheel, good for cleaning my index finger, the model shop didn't tell me that I needed an electric starter, mind you being a Southerner and living and buying it 'up North' I understand now. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted July 4, 2023 Share Posted July 4, 2023 Funnily enough my .19 did some time in one of those - rebodied with a Capri Laser style shell and I used telephone exchange selector bank cleaning tape to start it. No prop danger involved with the carb orientation in that usage. See how I’ve cunningly steered this diversion back to Lasers? 1 Quote Link to comment Share on other sites More sharing options...
Ted Khinsoe Posted July 5, 2023 Share Posted July 5, 2023 22 hours ago, Paul De Tourtoulon said: Turning while it's running, are you going for the Darwin award ?. Main needle tuning always when running. Low speed for me is a trial and error as (usually) a bit more fiddle to get to. Quote Link to comment Share on other sites More sharing options...
Ted Khinsoe Posted July 5, 2023 Share Posted July 5, 2023 21 hours ago, Martin Harris - Moderator said: Odd. I thought that was the way we all do it? Any other method would be extremely long winded. As long as any contact is with the back edge of the prop, you should only get a literal rap on the knuckles with no bloodshed. However, not the case with a pusher prop and you won’t find me within two inches of one of them. I still have the scars inflicted by a little Veco 20 from the mid seventies to remind me! To be more accurate I think the contact was when removing the glow igniter. Still really not sure how I got into that position as it caught the base of my little finger. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted July 5, 2023 Share Posted July 5, 2023 1 hour ago, Ted Khinsoe said: Main needle tuning always when running. Low speed for me is a trial and error as (usually) a bit more fiddle to get to. I thought you said that you were turning the carburettor around while it was running, i misread it. Quote Link to comment Share on other sites More sharing options...
Ted Khinsoe Posted July 11, 2023 Share Posted July 11, 2023 On 05/07/2023 at 23:26, Paul De Tourtoulon said: I thought you said that you were turning the carburettor around while it was running, i misread it. Ha Ha !! not even I'm that crazy!! 1 Quote Link to comment Share on other sites More sharing options...
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