RE: Bent crank ? I'll fix it for free.
 

As always, concise & relevant information backed up by clear & illustrative photos - great work Dave. We do appreciate it [8D]

RE: Bent crank ? I'll fix it for free.
 

....thank you, Bone. [sm=wink_smile.gif]

I've been slowed by a bad cold.....The parts are in. I'll get that bent crank straightened tonight. ;)

FBD.

RE: Bent crank ? I'll fix it for free.
 

Hang in there FBD. Hope ya kick that cold soon.

This entire thread is a great example of modelers HELPING other modelers. Far too many guys are willing to take advantage of and steal from their fellow modelers--over stupid toys.

FBD is to be commended for his generous offer to help out complete strangers. If I HAD a wrecked engine, I'd send it to him in a heartbeat. Be patient buddy--spring is a comin' and you may just get one outta me yet!! :)

RE: Bent crank ? I'll fix it for free.
 

.....thank you for the kind words, Rcpilot....:D

I'm finishing up the 3250 right now....it had the bent crank, and has a new case. I guess
it was in a bad wreck.

FBD.

RE: Bent crank ? I'll fix it for free.
 

Dave. Re. your comment about the 3250 you were just finishing up. I suspect that may be mine and yes it was in a hellava wreck. Had just bought it on e-bay and mounted it on my 18lb. Ultra Hots to replace the 3000 I had on it(same 3000 I finally found the backplate for DUH!). There was a notable differance in power. I was on my downwind leg when I no longer had control and straight in went the hots. That broke one of the lugs off and split open the crankcase. Postmortem: Transmitter battery died. After the plane went in I looked down at my tranny and the needle was on its way down to zero. If I had another minute I would have been on the ground rather than in it.
Dick

RE: Bent crank ? I'll fix it for free.
 

OK, Dick.....it's interesting to note the 3250 had noticeably more power than the 3000.
They are bascially identical, except the 3000 has a 35mm bore, and the 3250 is 36mm.

Here's the report on the 3250 with all the details so you'll know....

The crank came out great.
2. the zero dial indicator
3. the total run out came out about .00025 :D
4. I put a light hone on the cylinder to re-seat the ring
5. Heated the new case and installd the liner.

I heated the front housing and installed the new bearings. The front bearing has both shields still
on it, so it is lubed for life. The front end of the engine is sealed with a proper rubber seal anyway.
The rear bearing is open on both sides. I blew out the grease with compressed air but did not wash
the bearing, so the residual grease will keep the bearing protected and lubed.

I reinstalled the rod and piston. The cylinder wall, ring and piston and rod are oiled with Mobil 1
synthetic so no worries there. The front seal is greased on the inner lip, and I used some of my parts
and snugged down the prop collar onto the tapered collar so it is tight to the engine. Basically the
engine is totally massaged and ready to go. ;)

FBD. :D

RE: Bent crank ? I'll fix it for free.
 

The 3000 is massaged and ready to go....same story on the preperation, except I removed
the inboard shield on the front bearing just like it was stock. The ring tension is good, as well
as the fit in the bore was perfect contact. The head is torqued down.

I put a glow plug in it, and the compression is excellent. Both engines turn over perfectly and
the cranks are straight....they're ready for a great season of flying. I'm gonna package them
up and post them back today. I'll send back all the old parts as well. ;)

Is this fun, or what ? :D

FBD. :D

RE: Bent crank ? I'll fix it for free.
 

Dave, you are a most astounding individual. I won't say more because the more you do for all us guys who need your kind of expertise the more you are going to hear it. Just accept it. My fear is you have opened Pandoras box. In a couple of months we may hear that you changed your name, moved and left no forwarding address in order to escape all us dumb thumbers with bent cranks. DON'T ANYONE SAY ANYTHING ABOUT NON ENGINE BENT CRANKS.

Seriously my friend,thank you so much. And give me a total on the parts.

Dick

RE: Bent crank ? I'll fix it for free.
 

Let me be the FIRST one to second that statement !!

If there is EVER anything I can do for YOU just ask,I have a long memory;)

Craig

RE: Bent crank ? I'll fix it for free.
 

Ol man Dave lives so far back in the hills he doesn't need to change an addy. He just forgets to run the rod into town to pick up his mail for a month or three.
Don't worry guys, helping you get your engines running again is like a new woman to him.[8D]

Hang in there Pappy!

RE: Bent crank ? I'll fix it for free.
 

LOL Vic! I think you nailed it! :D

RE: Bent crank ? I'll fix it for free.
 

Dave's a pretty cool guy...and maybe he's channeling the spirit of Bill R.?;)[8D]:D

RE: Bent crank ? I'll fix it for free.
 

Dick.....It was 10 bucks for the ring (good price from Bowman) and 18 bucks for the brgs.

The engines are already on the way back, I mailed them (insured) two days ago. ;)

I think I have a Saito crank coming, and a rod to stress relieve coming as well. Maybe I'll
fix up a couple engines I have laying around here till something comes in. :D

BTW, those Boca bearings are sweet, and economically priced....very smooth too. [sm=thumbup.gif]

Thanks for the kind words, Felas....

FBD. :D

RE: Bent crank ? I'll fix it for free.
 

Dave
Received the engines today, they look and feel just dandy. Gotta finish up one project and then take a drive down past your stamping grounds to S.D. to see the zoos and the Midway. Going to put the 3000 in a Big Bee I just finished. The 2300 I have in it does not cut it. I'll let you know how it works out.

Regards, Dick.

RE: Bent crank ? I'll fix it for free.
 

Good news, Dick....[sm=thumbup.gif]

I'm happy you were satisfied with the quality of the work. Now I need to get busy
and fix up my two S.T. 3000's while I wait for some more work to come in. I should
have a Saito crank to straighten soon. ;)

FBD. :D

RE: Bent crank ? I'll fix it for free.
 

Dave,

Nice work.

I've used a well worn and plugged up brake hone on my engines. A little less aggressive but it did the trick.

RE: Bent crank ? I'll fix it for free.
 

....yep. Removing the old glaze and preparing the cylinder wall for a new ring is the key. Almost
any small hone will work....you can even prepare the surface by hand. ;)

FBD. :D

RE: Bent crank ? I'll fix it for free.
 

Fly Boy Dave, my saito .91 has a slightly bent crank, are you still repairing bent cranks? i sent you a pm

RE: Bent crank ? I'll fix it for free.
 

Yes, I will fix your crankshaft. Just send it with return postage, and I will repair it for free. ;)

I will go to the PM. :D

RE: Bent crank ? I'll fix it for free.
 

awesome Dave i cant wait to run my 91 again it was sweet :D


*edit ill send it to you in my lunch break

RE: Bent crank ? I'll fix it for free.
 

....no problem, I should have it coming back your way within 48 hours. :D

FBD. :D

RE: Bent crank ? I'll fix it for free.
 

....send the block as is....I will remove the front stud with a puller....;)

RE: Bent crank ? I'll fix it for free.
 

awesome will do that :D



edward r.

RE: Bent crank ? I'll fix it for free.
 

Hi Dave ... My ST 90 slightly bent crank (1/4") is on the way. US mail charged me $1.98 to ship it and would not sell me a pre printed postage . They would only sell me a $1.98 in stamps so I sent them in box. This way you don't have to go to post office.
Thanks Randy---Oh it is probably the worst bent crank you have seen without snapping off..........

RE: Bent crank ? I'll fix it for free.
 

FBD :D...legend in the making!