comanche260c

I purchased a byron p51 with a 41 us motor that i was told was gon overby dick barrett before he passed it wont start.I had it run once today after i cleaned carb an rebuilt it.No choke so i prime it with thumb than hand prop it .It will burble 5 or 6 times and stop,seems like it isnt getting gas.what sucks gas up to piston the crank case?? anyone with this engine or plane please help me

IFLYRC-RCU

My Feedback: (28)

Clean the internal carb screen. Soak it in Laquer thinner

Make sue diaphram in pump is OK and under the tab so it works...

jeff naul

My Feedback: (16)

Make sure your gaskets are lined up correctly. They have a small hole that allows a pulse of air coming from the crank case that lines up with a hole in the carb. Sounds like thats your problem. As you said your only running on the fuel provided from the choke.

BobH

My Feedback: (2)

By gaskets he means the one between the carb and the intake manifold. That's an easy check. If he went over the carb your screen should be clean. Carbs are simple things to fix. I've fixed hundreds of them.

A likely problem is.. Dick's been dead for a while. Your diaphragms are probably dry and stiff. Open your hi speed needle out a full turn and try again. You didnt say what your hi and lo needle adjustments were. Around 1 1/8 to 1 1/5 is a good place to start.

Keep us posted.

comanche260c

Bob The needle valves were at        LOW 2       and  3/4 on the high,        Bob I put new carb kit in it and it  ran once  for about  3 miuutes untilli hit kill switch.Does this tell me my rebuild carb was done right....Its just starting the dam thing someone said i need a 24 volt starter and hold finger in throat to choak it. HOW LONG HAS DICK BENNETT BEEN DEAD

comanche260c

Jeff it did run once so i guess i rebuilt carb right? its just to get it to run.someone said i need a starter and someone to choke the carb as i use starter?

alanc

i have just had exactly the same, but with an old zenoah 38, it hadnt run for maybe 10 yrs,changed the carb diaphram, ran sweet as a nut, it was stiff, it needs to be pliable

invertmast

My Feedback: (23)

Some of these older pre electronic ignition engines are very difficult to get running by hand propping bc you can get the prop spinning fast enough for a proper spark over more than 1 or 2 revolutions. They also need to be really primed well. If your carb, fuel and kill switch are all ok, then trying an electric starter will definitely save your arm!

BobH

My Feedback: (2)

OK 2 on the low and 3/4 on the high dont seem right. Try 1 1/2 on both sides as a starter. I think your rebuild is ok if the engine ran after the new kit.

Invert is right, hand starting can be difficult on Non-Ignition engines. The problem is getting the fly wheel spinning fast enough go generate sufficient spark. If you have a friend with a starter reach out to him.

Dicks been dead well over a year me thinks..

comanche260c

thanks for  all the replys im going to order a 24 volt starter this i was told will help me .these byrons with gear reduction need to be choked  by hand and  need a big starter i was told by previous owners Thanks  EDDIE

nine o nine

My Feedback: (1)

Yes, the engine needs to be primed WET. The thing with the Byron reduction drive is that it's pretty easy to get the spark by hand propping since the mechanical advantage is there. A starter will make the job easier but at the trade off of ruining the paint on that precious plastic spinner. Back in the day (I'm an old fart now along with Bob H ) once primed wet the start up was only a couple of hand flips. Good luck, Mitch

BobH

My Feedback: (2)

What.. Me Old? LOL.. Mitch are you and Matt comming down for WOD next month?

Mitch is right, WET is the operative word. A starter will help, at any rate.. let us know how it works out.

JeffH

My Feedback: (43)

On the Byron's setup, you are turning the engine twice as fast as you are flipping the prop so that is not a problem. G-38s and Q35-42 are easy to hand start. They do like be wet though. If you can choke it and it will run on the prime, things are probably assembled correctly. Make sure the pulse holes in the gaksets and insulator blocks are open, set the needles as advised earlier, and it might help to shoot some fuel in the carb to save on flipping. The carb may not have all of the air out of it yet from your rebuild.

Jim Cattanach

Did you flush out all the old fuel from the tank & fill with fresh fuel? Gasoline goes bad after a few months.

comanche260c

yes  new  lines and clean gas

2walla

My Feedback: (10)

I usually put a drop of solder on the choke plate to cover the hole so it gets a better draw on the fuel.. With the 2:1 reduction it should start by hand. Get it wet.... it will start..