Installed a Bing 48 carb on my 036

[Canadian farm boy]

Here we go,
I had a good spare fuel tank for my 036 kicking around. I got looking at the fuel tank and figured I needed to do something with it.
I did some digging and found a Bing 48 carb from a 038. I compared it to the 036 Zama C3A carb and concluded that it should fit on my spare 036 tank with out much hassle. I decided I had to do it.
Here's a couple pictures of the 2 carbs.
First picture is the Zama C3A.
Second picture is the Bing

 

[Canadian farm boy]

Bing carb mocked up on the 036 tank. I needed to do a bit of clearance work to allow for the Bing carb throttle linkage

 

[Canadian farm boy]

Fuel tank cleaned, and clearanced

 

[Canadian farm boy]

Installed a 038 intake tube

 

[redoakneck]

Bing. Love them. One on my 660 starts in two pulls, cold.

Would like to find more.

 

[Canadian farm boy]

The Bing throttle linkage connects on the bottom left side of the carb. The 036 fuel line would of been in the way and the throttle linkage would be rubbing it. I installed a 066 fuel line and elbow. I was then able to just run a piece of tygon fuel line from the elbow to the carb. This gave me lots of room for a throttle linkage. My spare fuel tank was missing the tank vent assembly. My frugal fix for this was to drill out the tank in the original vent location and add my own vent.

 

[Canadian farm boy]

At this point I was ready to install the Bing carb so I rebuilt the carb and installed it. Here it is installed with a custom made throttle linkage.

 

[Canadian farm boy]

The Bing carb doesn't have a built in choke. The original Zama carb does. I did some searching and found a v stack with a choke choke assembly. The ID of the v stack I got was smaller then the opening in the carb. I simply ground out the ID of the v stack till it matched the Bing carb.

 

[Canadian farm boy]

Now I needed to add the air filter. The v stack I got came with a pretty slick foam filter and fit great

 

[Canadian farm boy]

Here my 036 with all put together. I'd still like to install a cover to keep all the saw dust and junk out of the carb box but for now it's ready to go

 

[Canadian farm boy]

Some shop floor tuning and piss rev action. I should note here that this is without a bar and chain.

 

[Canadian farm boy]

Heres my 036 with the original Zama C3A carb. Saw is tuned to 15200 rpms wot
I'm running a 9 pin .325 sprocket, 16" bar and square filed chain. I timed each cut and averaged them out to be approx 4.6 seconds

 

[Canadian farm boy]

Here my 036 with the Bing carb. Same log, same bar, same chain, same sprocket. The saw is tuned to 15500rpms wot and still a touch fat.
I times each of these cuts and got an average of 3.06 seconds. The first 4 cuts are under 3 seconds.

 

[Canadian farm boy]

At this point I'm calling the Bing 038 carb a success. The idle is extremely touchy to the smallest adjustment. I still have a bit more tweaking to do but so far I'm happy with how well it works

 

[David Young]

Wow! Big difference

 

[junkman]

 

[Canadian farm boy]

Something else I should mention is that if a person didn't want the v stack and foam filter the original 036 air filter will still fit and you could still run the original filter cover. Total sleeper look. The only problem is that you wouldn't have a choke

 

[paragonbuilder]

Mike is this your dr. Al 036? Or a stock one? That is ported saw improvement! Over 30 percent! Wow!!!


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[Chainsaw Jim]

That's a really good gain from the carb swap.
You can drill a hole through the bing carb to install the choke shaft from the C3A carb and use a plate with the same choke bore size. I'm thinking the throttle shaft can also be swapped out. I believe you'd need to drill and tap a hole for the idle screw.

 

[Canadian farm boy]

Mike is this your dr. Al 036? Or a stock one? That is ported saw improvement! Over 30 percent! Wow!!!


Sent from my iPhone using Tapatalk

This is my drf255 ported 036. The saw ran absolutely awesome before. I really only did the 038 carb install just to see if I could and if it would work. I already had most of the parts I needed. The end result absolutely shocked me. I wasn't expecting the gains I got