Author Topic: Echo 3900  (Read 3075 times)

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Offline Cut4fun

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Re: Echo 3900
« Reply #30 on: September 13, 2012, 01:26:54 pm »
Just waiting on a oem air filter now.



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Offline 660magnum

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Re: Echo 3900
« Reply #31 on: September 13, 2012, 02:13:37 pm »
It looks very nice
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Offline rockyridge

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Re: Echo 3900
« Reply #32 on: September 14, 2012, 03:25:06 pm »
You're right.  The 345 has 3/8 LP.  It's a good little limb saw.  The chain has a narrower cut and it can slice through small limbs pretty quick.  I only wish it had a 14 inch bar, not 16.  That extra just gets in the way when I'm limbing stuff under 6 inches.

That saw looks to be in good shape.  I wouldn't want it with an 18 inch bar, though.  Both mine match nicely with 16 inch bars.

You gonna sell it of keep it?

Offline Cut4fun .

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Re: Echo 3900
« Reply #33 on: September 14, 2012, 05:00:36 pm »

That saw looks to be in good shape.  I wouldn't want it with an 18 inch bar, though.  Both mine match nicely with 16 inch bars.

You gonna sell it of keep it?

I'm going to put a 16" or smaller bar. Got to see what I got on hand.

As soon as I get the air filter and fine tune carb she can go to a new home. I'm not planning on keeping any saw I own IMO ;) well maybe 1 or 2 LOL.  They all live on my shelves on borrowed time.   :D
 I have a co-worker waiting on this one to be finished so they can stop by in the future and try 3 of my small saws out.  2 poulans and this echo.   

Let me know what you have in mind  in a PM. I can let it go PHO since you have bars and chains.
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Offline Cut4fun .

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Re: Echo 3900
« Reply #34 on: September 16, 2012, 01:43:50 pm »
Well I found a 64dl 325 15" bar and put it on the 3900 yesterday. Figured the new air filter would be here Mon in the mail.

Only thing was when I went to test it with new set up it fired off but didnt start like it had been. Then I pulled and pulled and pulled and it never fired again.   :P :P

So I put the spark tester on it no spark again.  :-X :-\  I'm cleaning the contact plate (after I get the flywheel off) and all connections again.
 If she dont have spark after all of this I am just going to assume the coils for these are a problem area.

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Offline Cut4fun .

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Re: Echo 3900
« Reply #35 on: September 16, 2012, 02:54:46 pm »
Found it during halftime. Where the plug wire goes into the coil. 

Anyone know how these plug wires are attached to the coil inside?  Do they screw in or glued in?

 Wish now I hadnt thrown the old bad coil away so I could dissect it.
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Offline Cut4fun .

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Re: Echo 3900
« Reply #36 on: September 17, 2012, 06:50:28 pm »
This new used coil quit again today. I'm going to pull the plug wire from coil to take a look some how later.

I'm not going to buy another coil.

If this dont fix it trying to remove old plug wire  and put another in it's gone or will be parted out.
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Offline Cut4fun .

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Re: Echo 3900
« Reply #37 on: September 18, 2012, 03:11:39 pm »
The coil is dead for sure now.  ;D

The plug wire wouldnt twist out like a husky so I just pulled the snot out of the wire and it came apart deep in the coil. So I then took a hacksaw to see how it was made in there and it was permanently attached.

I'm done with this 3900 because I am not paying $80 for a new coil and all it needs IMHO.

Trades or offers and will be listing in the trade section.

Also still have a new never used 3900 air filter in route.  ::)
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Offline Cut4fun .

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Re: Echo 3900
« Reply #38 on: September 18, 2012, 07:28:02 pm »
 Some info I picked up while searching Echo.   



Bars & Chains:

16F0AD3366 - 16" ProAm Double Guard Bar   

20LPX66CQ - 16" Super 20 Chain - 66 Links, Oregon LPX chain, 0.325 Pitch, Top filing angle 25 degrees, File Guide Angle 10 degrees, Depth Gauge Setting .025", Depth Gauge Tool # 22290, File Diameter 3/16".           
       
33SL66CQ -  16" Double Guard Chain - 66 Links, Oregon 33SL chain, 0.325 Pitch, 0.050 Gauge, Top Plate filing angle 25 degrees, File Guide Angle 90 degrees, Depth Gauge Setting .025", Depth Gauge Tool # 22290, File Guide part # 31692/37534, File Diameter 4.5mm or 5/32" part # 40461 or 40459.  (Discontinued)     

18F0AD3372  - 18" ProAm Double Guard Bar   

20BPX72CQ - 18" Micro Chisel Chain - 72 Links, Oregon 20BPX chain, 0.325 Pitch, 0.050 Gauge, Top Plate filing angle 25 degrees, File Guide Angle 90 degrees, Depth Gauge Setting .025", Depth Gauge Tool # 31941, File Guide part # 31690, File Diameter 3/16" or 4.8mm.

33SL72CQ  - 18" Double Guard Chain - 72 Links, Oregon 33SL chain, 0.325 Pitch, 0.050 Gauge, Top Plate filing angle 25 degrees, File Guide Angle 90 degrees, Depth Gauge Setting .025", Depth Gauge Tool # 22290, File Guide part # 31692/37534, File Diameter 4.5mm or 5/32" part # 40461 or 40459. (Discontinued)

Chain Sharpening:

99988800740 - 5/32" File 3-Pack (ECHO Branded)

99988800725 - 5/32" File Box of 12 (ECHO Branded)

99988800720 - 5/32" Chain Sharpening Kit - Includes Round Files, Flat File, Bar Scraper, File Guide, Handle and Carrying Pouch.

-OR-

99988800741 - 4.5 mm File 3- Pack (ECHO Branded)

99988800726 - 4.5 mm File Box of 12 (ECHO Branded)

99988800721 - 4.5 mm Chain Sharpening Kit - Includes Round Files, Flat File, Bar Scraper, File Guide, Handle and Carrying Pouch.

Storage:

99988801207 - "ToughChest 24" Chainsaw Case - Holds up to a 24" Bar and Chain along with necessary tools and supplies.

89850308034 - Plastic Scabbard - 20" Bar and Chain Scabbard. Marked in 2" increments to be cut anywhere between 12" and 20" in length.

SPECIFICATIONS

Engine Displacement: 39.6 (cc)         
Engine Displacement: 2.4 cu. in.

Length: 14.8 in.    Height: 8.4 in.    Width: 10.4 in.    Dry Weight: 9.5 lbs  (w/o bar & chain)
Carburetor: Walbro HAD type diaphragm               
Chain Tensioner: Side         
Chain Length (STD): 16"               
Chain Length OPT): 18"               
Vibration Reduction: STD               
Oiler: Automatic/ adjustable               
Oil Capacity: 7.8 fl.oz.               
Fuel Capacity: 13.5 oz.

TECHNICAL INFORMATION

Manufacture Date: 1990 - 1993                   
                             
Spark Plug: NGK BPM-7A OR 7Y

Spark Plug Gap: .024 - .028"                   
Shortblock: SB1013                   

Operating Speed: 8,000 - 9,500 RPM                   
Idling Speed: 2,700 - 3,200 RPM                   
WOT NO LOAD/ with bar and chain: 13,500 - 14,000 RPM
                   
Secondary Coil Resistance: 1.5 - 2.5 (K) Ohms                   

Fuel Ratio: 32:1 OR  50:1 WITH SPECIAL OIL APPROVED BY ECHO                   

Carburetors Used   Echo Part Number         Repair Kit          Gasket Kit         
WT-118A                 12300037332                 12310037330      12310137330         
WT-118B                 12300037332                 12310037330      12310137330         


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Offline rockyridge

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Re: Echo 3900
« Reply #39 on: September 20, 2012, 10:26:11 am »
Sorry to hear you've had such trouble with the saw.   :(

 

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