ABC Fourstroke Engine Help Needed !!!!!!  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       


90 Degree Muffler Adapter
Seller:  RC Specialties
Details:   $17.95   |  10/31/2008   |  Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> ABC Fourstroke Engine Help Needed !!!!!!
Page: [1]

Login
Message << Older Topic   Newer Topic >>
ABC Fourstroke Engine Help Needed !!!!!! - 10/17/2004 2:21:09 PM   
DragonHeart


 

Posts: 639
Joined: 7/15/2003
From: UK
Status: offline 		Hi Guys,

Wonder if anyone can help........ i tried to break in my new ABC Fourstroke engine today, and the instructions sate run it in like a 2 stroke, as full speed for 2 - 3 Minutes then let it cool down.........

It started but the only way it will keep going is to richen it up (kinda smokey) until it was about 1-1 1/2 turns from closed !!!!!!! is that running it too rich ? i ran 1 tank throu it but the engine got HOT !!!!!!!! so i allowed it to cool down. The engine makes kinda of a clicking noise (is that normal) when u turn it by hand......

So i kinda didnt wana ruin it so i came home for the day !!!!!!!, any help would be appreciated........

Thx
       Post #: 1

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/17/2004 5:17:25 PM   
Flyboy Dave



Posts: 13522
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: offline 		After you start it, close the needle until the engine is running as fast as it
will go. Then open the needle until the engine just begins to slow down a bit.
You will hear it. That type of engine is much tighter when new, and will get
quite hot, until you get some runs on it. Only run it for a few minutes at a time
then let it cool off. If you had a tach, you could richen (slow down) the engine
about 3-400 rpms, and it would be plenty rich enough to not overheat.

Dave.

_____________________________

An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
"Old Age, and Treachery will overcome youth and skill".
Revver Bro #4.

(in reply to DragonHeart)
       Post #: 2

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/17/2004 5:42:27 PM   
Hobbsy



Posts: 10873
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		The clicking is normal.

_____________________________

"I have gone faster backwards, upside down and on fire than most people have gone at all" Don Garlits

(in reply to Flyboy Dave)
       Post #: 3

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/18/2004 6:26:11 PM   
djlyon



Posts: 1995
Joined: 12/10/2001
From: Castaic, CA, USA
Status: online 		Dragonheart - What make of engine is it? I know of no 4 strokes that are ringless. All of Saito's aac and abc engines have rings. I don't believe a ringless 4 stroke with conventional valves and breathing will work, because of inadequate bottom end lube. So even though I agree with the instructions (I use that proceedure for all engines except the old iron stuff) be real carefull to not over heat that ring. Make sure it is seated good before really leaning on the engine.

Denis

_____________________________

I never met an engine I didn't like.
Of the things I've lost I miss my mind the most.

(in reply to Hobbsy)
       Post #: 4

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/18/2004 6:36:43 PM   
DragonHeart


 

Posts: 639
Joined: 7/15/2003
From: UK
Status: offline 		Hi,

Its an Old SC 65FS ABC........... i got it new from a guy who brought it about 10 years ago...........


(in reply to djlyon)
       Post #: 5

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/18/2004 7:00:25 PM   
djlyon



Posts: 1995
Joined: 12/10/2001
From: Castaic, CA, USA
Status: online 		I think that's a Magnum engine over here and it will have a ring I bet. You didn't hurt it running it rich. You don't have to worry about ABC pinch and running too rich with a ringed engine. But sence you did run it you have probable given the ring and the cylinder enough time to get acquainted. So you can probably do the thermal cycling now that they call for for the rest of it.

Denis

_____________________________

I never met an engine I didn't like.
Of the things I've lost I miss my mind the most.

(in reply to DragonHeart)
       Post #: 6

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/18/2004 11:21:06 PM   
w8ye



Posts: 18123
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: online 		Mine is ringed not ABC

Enjoy,

Jim

_____________________________

Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

(in reply to djlyon)
       Post #: 7

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/19/2004 12:26:04 AM   
Flyboy Dave



Posts: 13522
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: offline 		Only the new OS .70FS is ABC (ringless) as far as I know.

FBD.

_____________________________

An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
"Old Age, and Treachery will overcome youth and skill".
Revver Bro #4.

(in reply to w8ye)
       Post #: 8

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/19/2004 5:17:36 AM   
Motorboy



Posts: 1720
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline
quote:

djlyon: I know of no 4 strokes that are ringless.


Wrong! OS FS20 are ringless.

Jens Eirik

(in reply to djlyon)
       Post #: 9

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/19/2004 5:27:07 AM   
Motorboy



Posts: 1720
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline
quote:

ORIGINAL: Flyboy Dave

Only the new OS .70FS is ABC (ringless) as far as I know.

FBD.


Only the new OS .70FS is ABC(ringless)???

Both OS FS70 II and OS FS70 Ultimate are ringed.

Jens Eirik

(in reply to Flyboy Dave)
       Post #: 10

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/19/2004 5:47:59 AM   
djlyon



Posts: 1995
Joined: 12/10/2001
From: Castaic, CA, USA
Status: online 		Jens

I believe you but now I'm going to have to get off my butt and go look at my old OS FS20 to confirm it. How about the FS26 or do I have to look at that myself too.

Denis

_____________________________

I never met an engine I didn't like.
Of the things I've lost I miss my mind the most.

(in reply to Motorboy)
       Post #: 11

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/19/2004 6:11:55 AM   
Flyboy Dave



Posts: 13522
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: offline
quote:

ORIGINAL: Motorboy

quote:

ORIGINAL: Flyboy Dave

Only the new OS .70FS is ABC (ringless) as far as I know.

FBD.


Only the new OS .70FS is ABC(ringless)???

Both OS FS70 II and OS FS70 Ultimate are ringed.
Jens Eirik


I don't believe I see a ring listed here for the new OS .70 FS (Ultimate)....

http://www.gpmd.com/cgi-bin/wgpprt100p?&I=OSMG0875

I thought I read right here on RCU, that the new .70 FS had an ABC piston/liner
(ringless) and an airbleed carb....listed as improvements.

Are you sure about that, Motorboy ?

FBD.

_____________________________

An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
"Old Age, and Treachery will overcome youth and skill".
Revver Bro #4.

(in reply to Motorboy)
       Post #: 12

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/19/2004 6:27:29 AM   
djlyon



Posts: 1995
Joined: 12/10/2001
From: Castaic, CA, USA
Status: online 		Well my OS FS20 DOES have a ring according to the parts list that came with the engine as does my OS FS26 and 30. So I still know of no conventional model 4 stroke that does not have a ring. YS 4 strokes could get by without a ring because they use crankcase induction but they also have rings.

Denis

_____________________________

I never met an engine I didn't like.
Of the things I've lost I miss my mind the most.

(in reply to djlyon)
       Post #: 13

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/19/2004 6:35:51 AM   
djlyon



Posts: 1995
Joined: 12/10/2001
From: Castaic, CA, USA
Status: online 		Flyboy

ABC is not ringless necessarily. Many ABCs are ringed engines. I don't know about the OS70 ultimate but if it's ringless I would sure like to know how they lube the bottom end. Cause I don't think they use crankcase induction.

Denis

_____________________________

I never met an engine I didn't like.
Of the things I've lost I miss my mind the most.

(in reply to djlyon)
       Post #: 14

RE: ABC Fourstroke Engine Help Needed !!!!!! - 10/19/2004 12:29:03 PM   
Motorboy



Posts: 1720
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline
quote:

ORIGINAL: Flyboy Dave

I don't believe I see a ring listed here for the new OS .70 FS (Ultimate)....