Ninjashunt Posted September 10, 2014 Share Posted September 10, 2014 Hi there, After running out of fuel and trying to prime my hyper 7 with the finger over exhaust method, is there a stopper or plug available that people use when its too hot to touch? Can't seem to see one. Thanks Quote Link to comment Share on other sites More sharing options...
53HRA Posted September 10, 2014 Share Posted September 10, 2014 Is this what you're after mate? Quote Link to comment Share on other sites More sharing options...
Madmini Posted September 10, 2014 Share Posted September 10, 2014 I used to use a cork from a champaign bottle. (Also a good valid reason to drink a bottle of champers) 1 Quote Link to comment Share on other sites More sharing options...
atom3624 Posted September 10, 2014 Share Posted September 10, 2014 Which technique do people prefer? 1. Plugging exhaust? 2. Starving fuel? Some say that with the engine revving at severaly thousand RPM, to plug it could deform the conrod if too sudden. Some say that 'starving' the engine temporarily leaves it revving with inadequate lubrication. Al. Quote Link to comment Share on other sites More sharing options...
Ninjashunt Posted September 10, 2014 Author Share Posted September 10, 2014 Thanks for your help they are both ideal, may go with the cork then add the stopper when i next order from modelsport. I'm new so have only tried the exhaust option. Quote Link to comment Share on other sites More sharing options...
atom3624 Posted September 10, 2014 Share Posted September 10, 2014 Which technique do people prefer? 1. Plugging exhaust? 2. Starving fuel? Some say that with the engine revving at severaly thousand RPM, to plug it could deform the conrod if too sudden. Some say that 'starving' the engine temporarily leaves it revving with inadequate lubrication. Al. I raised this, as I know some people have strong views on both methods. It's nice hearing the opinions of 'those in the know', and also if there are any alternatives. I tried a Killer Bee ignition cut out for nitro, which I think simply pinches the fuel line, like the Quote Link to comment Share on other sites More sharing options...
Smoothybb Posted September 10, 2014 Share Posted September 10, 2014 Tbh, I can't see either really doing any damage. Plugging, you won't get perfect seal in an instant so you'll slow the engine before it comes to a stop and there will be some compression of the air in the exhaust before the con-rod deforms. Starving of fuel, it only runs until there's not enough fuel to go bang so in theory stops as the fuel/oil mix runs out. The pinch should be enough to slow it down without it completing another 100 or so cycles with some residual lubrication remaining. Just my uneducated thoughts. When I used to run proper 2 strokes, it was always starve it of air for shutdown thus maintaining lubrication but a less harsh stopping rate. Quote Link to comment Share on other sites More sharing options...
Anthoop Posted September 10, 2014 Share Posted September 10, 2014 I always plug the pipe...but I do also run my engines/tanks/lines totally out of fuel when finished for the day.... Neither method is ideal when looking at it theoretically...but (as above) probably neither will make much difference... Quote Link to comment Share on other sites More sharing options...
abarth_1200 Posted September 14, 2014 Share Posted September 14, 2014 Would plugging the exhaust be better for a quick fuel up and start again so that you don't need to prime the carb, as when you pinch the line all the fuel is sucked from the carb and a re prime would be needed upon restart. Quote Link to comment Share on other sites More sharing options...
J.K Posted September 14, 2014 Share Posted September 14, 2014 Nothing stopping you refuelling with the engine still running fella 2 Quote Link to comment Share on other sites More sharing options...
Anthoop Posted September 14, 2014 Share Posted September 14, 2014 Would plugging the exhaust be better for a quick fuel up and start again so that you don't need to prime the carb, as when you pinch the line all the fuel is sucked from the carb and a re prime would be needed upon restart. Yes. If you plug the pipe to stop the engine then refuel it should start easily.......but you can always refuel with the engine running... Quote Link to comment Share on other sites More sharing options...
abarth_1200 Posted September 14, 2014 Share Posted September 14, 2014 Ah didn't realise that, I thought you needed the pressure from the exhaust to push the fuel through the lines. Will try that next time, F1 pitstop style, well back in the day anyway Quote Link to comment Share on other sites More sharing options...
Smoothybb Posted September 14, 2014 Share Posted September 14, 2014 The exhaust pressure is only really needed under acceleration and higher revs. It'll draw fuel in under it's own steam at idle. Quote Link to comment Share on other sites More sharing options...
jizwizard Posted September 15, 2014 Share Posted September 15, 2014 the proper way to stop it would be by the flywheel. U can get the right tool to do this or like me could use your finger. Quote Link to comment Share on other sites More sharing options...
J.K Posted September 15, 2014 Share Posted September 15, 2014 the proper way to stop it would be by the flywheel. U can get the right tool to do this or like me could use your finger. How many fingers do you have left?? Quote Link to comment Share on other sites More sharing options...
jizwizard Posted September 15, 2014 Share Posted September 15, 2014 lol try it. It really doesn't take much effort to stop these engines. Try it with gloves first Quote Link to comment Share on other sites More sharing options...
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