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us41 in byron p51 - 6/13/2012 3:52 PM   
comanche260c


 

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Status: offline 		Good Morning I just bought a byron p51 with us41 and it wont start .I was told it was serviced by dick barrett before he passed. It hasno choke so i choke it with my thumb. I took it apart and everything looks good and  soaked it in carb cleaner.....when i choke with thumb i will get a few pops but wont fire. high needle was  3/4 open  low 2 turns.I tryed 2 1/2on both also and nothing......any  ideas ???????

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RE: us41 in byron p51 - 6/13/2012 4:19 PM   
comanche260c


 

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Status: offline 		forgot to ask does anyone know  what carb  number the us 41  need incase ineed to order one ??

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RE: us41 in byron p51 - 6/13/2012 4:27 PM   
waynem


 

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Status: offline 		Does it have a spring starter? If you are flipping by hand all you are likely to get is a pop. I would set the needles at one and one-half open to start with. Wayne

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RE: us41 in byron p51 - 6/13/2012 4:57 PM   
comanche260c


 

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Status: offline 		no wayne no spring starter.I see they start them on you tube  by hand by flipping

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RE: us41 in byron p51 - 6/13/2012 10:51 PM   
comanche260c


 

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Status: offline 		update rebuilt carb    primed by handgot it torun and throttle linkage felloff wasat  1/2throttle ran  for 2 minutes   and I  stopped it.couldnt getit to run again  tryed 15 times.I primeit and   it  willfire after  5  tryes but  burmles   5  or 6 times, soundslikeits not getting gas  any ideas  please help my armis sore  EDDIE

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RE: us41 in byron p51 - 6/14/2012 3:54 AM   
masteromodels


 

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Status: offline 		I have had a number of these over the years, I always use a starter with 24 volts and someone with their finger in the carb to choke it. The ones you probably saw on you tube were changed to electronic ignition

instead of magnito. You will be flipping by hand till your arm is sore and it probably will not start and run.

bob

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RE: us41 in byron p51 - 6/14/2012 12:52 PM   
fireman7875


 

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Status: offline 		I had one of these engines a few years ago and although it ran GREAT, the only way I was ever able to hand start it was to slap the prop as hard as I could. I dont recommend that, by the way. I started using a starter. If you got it running it more than likely is still getting fuel. Fix the throttle linkage and try it again with an electric starter. Until you have a reliable starting METHOD you will be chasing your tail. Hope you get it figured out.

Brian

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RE: us41 in byron p51 - 6/14/2012 2:32 PM   
OldScaleGuy



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Status: offline 		I agree with the above. Mine runs great but starting has always been an issue even with a spring starter. The best way i have found is with a 24 volt starter as well. Make sure the prop is positioned properly.

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RE: us41 in byron p51 - 6/14/2012 3:08 PM   
masteromodels


 

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Status: offline 		Like I said above a 24 volt strter with the belt drive or gear drive with 2 twelve volt batteries hooked together to get the 24 volts needed and someone to choke it and it will start very easy. I have built at least a dozen or so of the Byron P-51's over the years and this sytem works.

Bob

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RE: us41 in byron p51 - 6/14/2012 7:49 PM   
comanche260c


 

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Status: offline 		No wayne no spring starter on it

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RE: us41 in byron p51 - 6/14/2012 7:51 PM   
comanche260c


 

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Status: offline 		No wayne no spring starter on it

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RE: us41 in byron p51 - 6/14/2012 8:11 PM   
comanche260c


 

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From: manorville, NY, USA
Status: offline 		can you calll me my arm is sore I need someone to talk to that has owned this bird.EDDIE 631 445 1972

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RE: us41 in byron p51 - 6/14/2012 8:50 PM   
Rodney



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Status: offline 		Those old Quadra are a very good engine although very heavy for the power out. It is almost impossible to wear one out. You do need to have the carb serviced, most lawn mower shops have the repair kits for about $10 and they are easy to install. Just pay very close attention to the disassembly so that you can do the reverse when you put them back together, maybe the lawn mower shop will do it for you. You will find the number of the carb stamped on the carb itself . they like to start wet, choke the devil out of them before flipping the prop. I've always started mine with the spring starter but the 24 volt helper would be appreciated. I've never used the electronic ignition (all mine are the old fashioned type) but those I've seen with electronic ignition are sure easier to start, well worth the conversion if you can afford one.

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RE: us41 in byron p51 - 6/14/2012 8:51 PM   
NM2K


 

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Status: offline 		Don't despair. You've got it running and now you are melting all of the old gasoline residue out of the carburetor. It will continue to improve in its running characteristics with the more running time that you accrue.

When starting the engine by hand, it is important to accelerate the prop through top-dead-center (TDC). After all, the electricity that is used to develop a spark across the plug's electrodes is generated as you whip the prop through its arc. Limp wristing will just ensure that the engine will not start. In fact, now that you have gotten the engine started by hand, you should feel proud. Not many folks can master that skill. Stay at it and you will get it down like a champ. Stop in and let us know of your progress.


Ed Cregger



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RE: us41 in byron p51 - 6/15/2012 12:29 AM   
MarvinLoomis


 

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Status: offline 		Got a Q42 with the prop reduction in the same bird. Had similar problem, replaced spark plug and problem solved. Might be worth the investment in a new plug. Mine would fire, but just wouldn't take off and run. Shocked hell out of me, because figured if it was firing the plug had to be good!!

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RE: us41 in byron p51 - 6/15/2012 12:38 AM   
MarvinLoomis


 

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Status: offline 		One other thing to check is the gap between the flywheel and the mag is right. I've found if you place a business card between the mag and the flywheel and hold the mag tight against it and tighten up the mag bolts its just about right.

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RE: us41 in byron p51 - 6/15/2012 1:15 AM   
fred985


 

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Status: offline 		i have been flying 2 us engines in 1/4 cubs for years. starting by hand is near impossible. they both start great with the old elctric 12 volt starter and it dosent matter where the prop is positioned. i spin it by hand a few times with the thumb on the carb then hit it with the starter.

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RE: us41 in byron p51 - 6/15/2012 4:10 AM   
comanche260c


 

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Status: offline 		thank you All for your response I highly appreciate your time to solve my problem with the byron p51..Ispoke to Masteromodels who owned several of these planes he said i do need a 24 volt starter that i will get,I think the gear reduction adds to the starting problem.I have rebuilt the carb and adjusted the mag.Hope the starter will solve my problem...... MAN IS MY ARM SORE FROM TRYING FOR  DAYS   Thanks again  to all for your help....... EDDIE

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RE: us41 in byron p51 - 6/15/2012 6:42 AM   
PropsnWings


 

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Status: offline 		I own a US41, and everyt time I took it to the field, it would flood and never fire.  So I took the plug out, spin it over to clear the excess fuel, put new plug in, and with a starter it would start.... but never started by hand.  It now sits on a shelf... this is the second one I owned and both were hit or miss on starting.   I believe its weak magnets in the flywheel causing the magneto to not produce a strong enough spark. 


quote:

ORIGINAL: comanche260c

Good Morning I just bought a byron p51 with us41 and it wont start .I was told it was serviced by dick barrett before he passed. It hasno choke so i choke it with my thumb. I took it apart and everything looks good and  soaked it in carb cleaner.....when i choke with thumb i will get a few pops but wont fire. high needle was  3/4 open  low 2 turns.I tryed 2 1/2on both also and nothing......any  ideas ???????



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RE: us41 in byron p51 - 6/15/2012 9:34 AM   
beepee


 

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Status: offline 		I have enjoyed both of mine. One has always started just fine with the spring starter. The other was converted to electronic (CH) when the magnet mounting boss broke off the front of the case (no crash involved). It starts beautifully by hand. The only difference between the two, to me, is weight. Some of my installations need the nose weight. They will get the spring started magneto version. If I need to save weight at the front, it gets the electronic version. I think it is about a 10 oz. difference.

ANY time I have tried to hand start the magneto ignited engine it has been no-go. I am not in this hobby to fight my engines. If it ain't easy, I do sumptin diffurnt.

Bedford

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RE: us41 in byron p51 - 6/15/2012 1:38 PM   
RACJ


 

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quote:

ORIGINAL: comanche260c

thank you All for your response I highly appreciate your time to solve my problem with the byron p51..Ispoke to Masteromodels who owned several of these planes he said i do need a 24 volt starter that i will get,I think the gear reduction adds to the starting problem.I have rebuilt the carb and adjusted the mag.Hope the starter will solve my problem...... MAN IS MY ARM SORE FROM TRYING FOR  DAYS   Thanks again  to all for your help....... EDDIE

For the money spent on 24V starter and batteries and dragging them to field(I thought no support eguipment was one big reason for gas) take the money and get a DLE55.Use the US41 as a boat anchor or sell it for $50 + shipping. I got my FLAME suit on but this is GOOD advice.

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RE: us41 in byron p51 - 6/15/2012 1:51 PM   
comanche260c


 

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Status: offline 		dle 55 would be nice but wont fit in  byron with gear drive it has to turn the 2 foot 4 blade prop

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RE: us41 in byron p51 - 6/15/2012 3:17 PM   
RACJ


 

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Status: offline 		OK,I gotcha on that. I'd put my money in electronic ignition then. The 24V starters and batteries are heavy and besides the fuels cost savings the other big benifit IMHO of gas over glow is flip and fly with no support equipment to lug around. With no choke use syringe or bulb and squirt gas in carb,flip and fly with EI.

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RE: us41 in byron p51 - 6/15/2012 4:49 PM   
airega1



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quote:

ORIGINAL: comanche260c

Good Morning I just bought a byron p51 with us41 and it wont start .I was told it was serviced by dick barrett before he passed. It hasno choke so i choke it with my thumb. I took it apart and everything looks good and  soaked it in carb cleaner.....when i choke with thumb i will get a few pops but wont fire. high needle was  3/4 open  low 2 turns.I tryed 2 1/2on both also and nothing......any  ideas ???????

To be quite frank, a US 41 is not going to fly a Byron mustang safely. is it a Byro Drive system or a straight prop system

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RE: us41 in byron p51 - 6/15/2012 6:14 PM   
Boro


 

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Status: offline 		I have a Q-42 and have went thru the same thing. Checking carb, plug , sore arm and all. I got mine to start every time now by cleaning the mag pick-up and flywheel areas and setting the proper gap. Installing a spring starter. With the prop clocked to pass by magnet a couple times after winding spring, it starts every time. I flip with carb choked untill fuel is present and then turn on ignition switch before starting. Just my two cents, good luck

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