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Author Topic: really easy?  (Read 751 times)

Offline roger

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really easy?
« on: September 19, 2010, 04:26:43 PM »
what makes a sure start a good motor? i remerber a cox motor hard to start and only ran a few seconds what is the proper break in procedural on these motor or are they still a pain?
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Offline Jim Thomerson

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Re: really easy?
« Reply #1 on: September 19, 2010, 04:38:36 PM »
I don't know about the surestarts.  I have flown TD 049's, and Black Widows a lot.  You need a fuel with at least 15% nitro and 20 % oil, all castor oil is good.  You need a hot battery as the glow plug needs to, as I say, a little exaggeration, light up like a flashlight.  Presuming all is well, Open the needle about three turns, and squirt some fuel in the exhaust ports.  With a spring starter, turn the prop backwards, attach the glow plug battery and turn the prop loose.  On the TD, choke it once or twice, Squirt fuel in the exhaust.  Turn the prop backwards to straight up and down.  Attach battery and hit the prop forward with your GLOVED finger.  With a little practice, Cox engines are very easy to start and can be made to run reliably. 
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Offline jim gilmore

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Re: really easy?
« Reply #2 on: September 19, 2010, 04:56:00 PM »
Starting halfA's can be a pain.
And on less than 15% nitro it can be harder,but there is a trick.
Cox made and sold a starter called the surestart. At least that's what the name on my unit is if I remember correctly. It has a on off switch and a button to push when you flood the engine.
In effect I use that little button almost all the time because the slightly higher voltage makes the engine start easier. Especially with lower nitro fuel. I never bought seperate fuels. If it ran the fox 35 it ran the cox golden bees or baby bee's.
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Offline kenneth cook

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Re: really easy?
« Reply #3 on: September 19, 2010, 06:33:51 PM »
    Roger, the Sure Start engine line was made for keeping costs down. It does produce fair power though due to its dual port configuration. The engines were made available directly through Cox at one point for $4.00. I bought 10 of them at that time. I can't say that they equally all run the same though. I have one that runs terrifically and one that just doesn't want to turn up for me. These engines just don't seem to have the same kind of tolerances the older Cox equipment had. You just have to realize that times changed and it was actually cheaper to buy the engine just for the plug. You couldn't purchase a plug for as cheap as the whole engine. I use Perfect tanks with these engines on some planes and you get a darn good run out of them with good performance. I have one that gives some of my Norvel engines a run. As long as the reed is in good shape and you have no leaks they just work. You can do a bit of hopping up on them and get even better performance. Ken
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Offline LARRY RICE

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Re: really easy?
« Reply #4 on: September 19, 2010, 06:53:45 PM »
     I do not know why you were having a hard time, these engines are very easy to start.  As a Cox service center I must have started hundreds of them.  FIRST USE 1/2A FUEL!!!!! Next check to see that the glow head is on tight.  90% of the troubles that I saw was low or dead battery and loose glow head.  The other 10% was dirty.  Newer Cox engines use 2 to 3 tanks of fuel to break in. Use an over size prop (6x3) and run it rich.
     If your engine starts then stops it is either too rich or too lean.  Lean is when the engine speeds up just before it stops, rich is a low rumble or burp.  Fill the tank, Set the needle out 3 turns, squirt a little prime into the exhaust port, hook up the battery you should hear a sizzle (if not check your battery and glow head).  You must flip the prop with a SNAP (just like snapping your fingers). The engine should fire up in less than 10 flips if it does not and the sizzle stops blow into the exhaust port, rotate the prop slowly 3 to 4 times, try to start if there is no answer from the engine re-prime.  These engines love prime but you can flood them.
     When the engine starts adjust the needle to get a high pitched scream.  If the engine quits decide if it is too rich or lean and adjust, then restart.  Once running it the highest RPM back the needle off slightly as it will run better and longer slightly rich, leans out in the air. When it quits it will be very HOT DO NOT TOUCH.
lARRY
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Offline George

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Re: really easy?
« Reply #5 on: September 21, 2010, 09:11:57 AM »
Quote from: roger on September 19, 2010, 04:26:43 PM
what makes a sure start a good motor? i remerber a cox motor hard to start and only ran a few seconds what is the proper break in procedural on these motor or are they still a pain?

Another thing that makes these engines start easier is the information available on the internet - like Larry just provided you.

Many of us had to work it out with written instructions or less.  ;D

George
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George Bain
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