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Model Forum / Radio Controlled / Land Models / January 2004Hyper .21 problems
The engine is not turning over by itself. I have the Hyper 7 PBS wit the bumpbox. The engine will turn over fine on the bumpbox, but onc the bumpbox isn't going anymore the engine dies. I've got the MC59 glo plugs in with Blue Thunder 20%, if that makes any differenc - Beowul ---------------------------------------------------------------------------------- Posted from the RCGroups.com Discussion Forums Visit us at http://www.rcgroups.com <------- Win free R/C Gear View this thread at rcgroups.com: http://www.rcgroups.com/forums/showthread.php?threadid=18313 low compresion maybe? if compresion feels ok then try carb adjustments idle speed may be to low - everfas ---------------------------------------------------------------------------------- Posted from the RCGroups.com Discussion Forums Visit us at http://www.rcgroups.com <------- Win free R/C Gear View this thread at rcgroups.com: http://www.rcgroups.com/forums/showthread.php?threadid=18313 Compression may be too low, if I don't heat up the engine first th piston sticks at the high point. If the compression is too low, ho would i change it - Beowul ---------------------------------------------------------------------------------- Posted from the RCGroups.com Discussion Forums Visit us at http://www.rcgroups.com <------- Win free R/C Gear View this thread at rcgroups.com: http://www.rcgroups.com/forums/showthread.php?threadid=18313 If the piston sticks at TDC, then the compression isnt likely to be low. Usually compression drops as an engine wears out - and piston sticking is only common to newer engines. Keeping an engine warm is always a good idea before starting....they are finicky and being cold doesnt help. Other things to try: 1. CHANGE THE GLOWPLUG. First and always thing for an unhappy engine. 2. Change the glowplug battery. I still commonly get screwed out of playtime because i showed up to the park with a dead glow battery. 3. Idle stop adjustment set too low. Its the little screw in the front (usually) of the carb that keeps the throttle barrel from closing all the way. 4. engine tuning. Its a whole big story, but start by reading the manual that came with the car. > Compression may be too low, if I don't heat up the engine first the > piston sticks at the high point. If the compression is too low, how [quoted text clipped - 6 lines] > Visit us at http://www.rcgroups.com <------- Win free R/C Gear! > View this thread at rcgroups.com: http://www.rcgroups.com/forums/showthread.php?threadid=183132 Hi rc'ers, I too have been struggling with my ofna pirate 10 .21 for months. Finally, I got it sorted. Hopefully, these tips can help someone. The BIG factor was buying a starter box. My middle finger was becoming calloused from the pull start. (seriously) This allowed me to pull out the glo plug and watch the "cloud" of fuel blowing out the hole. I could also then see how the screw adjustments were affecting the "cloud". (This gave a very rough idea of the correct carb settings, which in my frustration I had been tweaking.) And, echoing step 2 from below, the glo battery charge is critical. I'm sure I wasted many pulls just from a too weak battery. (I bought a rechargeable which i have yet to test. But, I'll keep the disposable as a backup.) I feel like I've jumped a high hurdle in the understanding of these finicky little motors. Patience and willingness to spend a little time and $$ seems to have paid off. Many thanks for the advice and encouragement I received from several of you, esp. most recently Mark Stevens. Thanks! and it's starting out to be a HAPPY NEW YEAR! Jay Sparks P.S. regarding step 3 below: If you are referring to the air gap, mine is suggested to be set at 1/16" open, not completely closed. (?) > If the piston sticks at TDC, then the compression isnt likely to be low. Usually > compression drops as an engine wears out - and piston sticking is only common to newer [quoted text clipped - 24 lines] > > View this thread at rcgroups.com: > http://www.rcgroups.com/forums/showthread.php?threadid=183132 I had the same problem and found out that the grow plug wasn't gettin hot enough. Try using a Ni-Ad battery thats over 1500mAh. Don't use a off the shelve battery. ; - GUYZER111 Guy Weiers guyzer.w@telus.ne ---------------------------------------------------------------------------------- Posted from the RCGroups.com Discussion Forums Visit us at http://www.rcgroups.com <------- Win free R/C Gear View this thread at rcgroups.com: http://www.rcgroups.com/forums/showthread.php?threadid=18313 |
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