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Stihl 65cc 4-mix on 30% Edge

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Old 09-21-2008, 10:09 AM
  #101
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Default RE: Stihl 65cc 4-mix on 30% Edge

Prop Nut, We went to a Float flying event yesterday, about 1/1/2 miles east of Coral Mi. It was a pretty fun event on a small lake. Best Regards Capt,n
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Old 09-21-2008, 10:26 AM
  #102
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Default RE: Stihl 65cc 4-mix on 30% Edge

Yep, that is spitting distance from my house. I thought about stopping by but we had family over for the weekend.
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Old 09-21-2008, 12:38 PM
  #103
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Default RE: Stihl 65cc 4-mix on 30% Edge

Here is a pic for size comparison.From left to right:Stihl,Honda,Briggs.
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Old 09-21-2008, 01:53 PM
  #104
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Default RE: Stihl 65cc 4-mix on 30% Edge

John, you forgot to put a ruler down below them
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Old 09-21-2008, 02:32 PM
  #105
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Default RE: Stihl 65cc 4-mix on 30% Edge

Neat engines! Capt,n
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Old 09-22-2008, 11:28 AM
  #106
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Default RE: Stihl 65cc 4-mix on 30% Edge

Here ya go, Prop nut!
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Old 09-23-2008, 06:20 PM
  #107
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Default RE: Stihl 65cc 4-mix on 30% Edge

Ran it with 24x10 Xoar prop today.It ran fine but today is cloudy and my cheapo tachometers don't work well unless the sun is shining. I could get "flashes" in the low 5,000 range, but couldn't get a steady reading. Hopefully we'll get a few more sunny days before we get into the perma-rain season here in the Seattle area. I can start it cold now with 2-3 flips so that's all good.

J
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Old 09-24-2008, 08:54 PM
  #108
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Default RE: Stihl 65cc 4-mix on 30% Edge

Runs good, I retarded the ignition to 25degrees, it makes starting easier and I am not looking for max power now. I took it off the test stand and put it in the DVII. I will have to rearrange a few things but it should be good to go soon.

Prop is 24x10 that I cut down to 23x10 and tried to stain it so it would look better than just a stock prop. It looks darker without the flash.
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Old 09-24-2008, 09:04 PM
  #109
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Default RE: Stihl 65cc 4-mix on 30% Edge

John, we want video!!!! For the sound man! Lets hear it!


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Old 10-13-2008, 03:05 PM
  #110
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Default RE: Stihl 65cc 4-mix on 30% Edge

Things get easier the second time around. I finally got around to firing up the second Stihl today and it started running rather quickly,and runs well.On this one I didn't remove the compression relief mech.(for starting) on the cam, but so far it doesn't seem to make a difference. However it started raining before I could play with it too much.

If we have OK weather this weekend I am going to fly the DVII with the first Stihl installed and hopefully we'll have video,or at least pictures.

J
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Old 10-15-2008, 03:35 PM
  #111
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Default RE: Stihl 65cc 4-mix on 30% Edge

Son of a gun.I took out Stihl #2 to run today and it had almost no compression. After some head-scratching and checking various scenarios, I am pretty sure the the exhaust valve is leaking. Now I have to take the bloody thing apart to find out why. I hope it isn't burnt or something worse.
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Old 10-15-2008, 06:00 PM
  #112
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Default RE: Stihl 65cc 4-mix on 30% Edge

Well that wasn't so bad. I took the engine apart and sure enough there was a chunk of carbon stuck on the exhaust valve. I took the valve out, cleaned it up,and then thought "why not lap it?". Automotive lapping compound seemed too coarse for an engine of this size so I used rubbing compound,thinned down into a slurry (don't ask what I used to thin it with). The tricky part is that the Sthil has a one-piece cylinder (like Saito) so I put a pencil into the chuck of my electric hand drill and used the eraser end of the pencil pressed against the valve bottom to spin the valve around in its seat .Since I had the engine apart I did the intake valve as well. I put it back together and sure enough the compression is back and then some!!
My years as an amateur Alfa Romeo (1971 Spider) mechanic are finally paying off!
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Old 10-15-2008, 07:53 PM
  #113
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Default RE: Stihl 65cc 4-mix on 30% Edge

Great improvising!
That kind of stuff is what makes this hobby great!
Cheers,
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Old 10-15-2008, 08:18 PM
  #114
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Default RE: Stihl 65cc 4-mix on 30% Edge

I have lapped a lot of valves this way.

As long as you end up with a shinny ring all the way around the valve then it's good.

On car engined I simply chucked up the valve stem and pulled the seat and the face together.

I just got back from a 2 week vacation and hope to start mine soon.
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Old 10-15-2008, 08:29 PM
  #115
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Default RE: Stihl 65cc 4-mix on 30% Edge

I want one now

Actually, I am making a homemade gear reduction system like the Toni Clark dealy bob.
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Old 10-15-2008, 09:29 PM
  #116
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Default RE: Stihl 65cc 4-mix on 30% Edge

ralphbf,

It would have been better (and easier ) to pull the valve stem from the top side but there just isn't enough valve stem sticking out to do that,at least with the drills I have.

Thanx guys!!
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Old 10-23-2008, 09:20 PM
  #117
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Default RE: Stihl 65cc 4-mix on 30% Edge

No pics or video since I didn't go flying. My mother passed away last week so I've been busy hosting family and friends plus taking care of all the various things that need to be taken care of.

J
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Old 10-23-2008, 09:39 PM
  #118
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Default RE: Stihl 65cc 4-mix on 30% Edge

J, Very sorry to hear that. A close friend lost his grand mother yesterday and I'm going to the wake tomorrow night. We are never prepared for this. I lost my mother in 97.
VBR, John
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Old 02-08-2009, 02:13 PM
  #119
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Default RE: Stihl 65cc 4-mix on 30% Edge

wow a comparison of size great!!!!!!


what are the model is the stihl what cc is it i know the honda is the gx35 35cc and the briggs is a 34 cc but what stihl is it ?
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Old 02-09-2009, 02:15 AM
  #120
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Default RE: Stihl 65cc 4-mix on 30% Edge


Quote:
ORIGINAL: tripp3d

Here are a few pics of my KMP 30% Edge on maiden flight today...

Stihl 65cc four stroke 50:1 mix
22x10 prop
(5) 200 oz digital hi torque (Tower Pro) servos
Hi,
What servo did you use, MG995 and MG945? And they went wrong, you had no problem with them? And tempted me because they are cheap. Very interesting conversion, I do hope I get a big engine 50-60cc 4 stroke.
Good luck!

Mugurel
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Old 08-19-2009, 07:39 PM
  #121
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Default RE: Stihl 65cc 4-mix on 30% Edge

Well, it took a long time but the DVII with the Stihl 65 flew this last weekend. What a hoot! It is probably overpowered as I could get a high- speed cruise at half throttle or less. The sound was to die for! After I landed people were coming up and asking me what the heck I had in there.
I hope to have video soon.

J
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Old 08-19-2009, 07:53 PM
  #122
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Default RE: Stihl 65cc 4-mix on 30% Edge

Congrats on the success, and yes please! Video!

AV8TOR
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Old 08-19-2009, 07:57 PM
  #123
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Default RE: Stihl 65cc 4-mix on 30% Edge

That's great J, what prop are you using? Congrats!
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Old 08-19-2009, 08:04 PM
  #124
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Default RE: Stihl 65cc 4-mix on 30% Edge

Quote:
ORIGINAL: JohnF

That's great J, what prop are you using? Congrats!
the XOAR 24x10 cut down to 23x10. Probably over-propped for max power but I was sure I didn't need max power. I feel the best prop for this engine is a 22x10, if you want the most power/thrust.

J
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Old 08-19-2009, 08:23 PM
  #125
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Default RE: Stihl 65cc 4-mix on 30% Edge

Thanks j, I should have looked back in your thread before asking. How much does the D VII weigh again?
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