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Here is an Echo 7310 that is holding its revs pretty good. Im glad to see that Echo is building something that can be worked on. 9hp on Joe's Dyno is something special.

3/8 2450 24inch 50 gauge in 3/8 chain. Oregon made some Universal Fit bars, and this could be one of them. Means it works on any model that can oil it. Otherwise, looks like an old Homelite to me.

Which carb? WT-1239? Some of the small echo saw's have the Walbro 589 style accel pump like used on the reed valve 302/305/306/341 and related. I have seen that accelerator pump called a starting system in some of the books. After you pump the purge bulb a couple times, pump the throttle...

Why beat yourself up? Noodle that round down and then split pieces off...or use a splitter.

The walbro carbs have 5mm splines on the newer ones. The older carbs were 4mm. There is a pac man that is supposed to work on the larger screws. Your best bet is to slot the jets with a small cut off wheel if you want a fully adjustable carb.

Check the gaskets to diaphragm order in the carb. Sounds like its starving for fuel. On the pump side (single screw) the diaphragm goes down first, followed by the gasket and then the cover. On the metering side (4 screws) the gasket goes down first, then the diaphragm and then the cover...

You can try to grind the nub down, but if you use a dremel and slip off it usually puts a hole in the diaphragm. I used a file and folded the diaphragm material over and got one to work in an HDC carb. For the parts, you should be able to get the Walbro kit or which ever parts you need for the...

Cool Beans!

There were two different coils and two different flywheels used on the 8000. They dont mix and match. The early system uses 3 magnets on one side of the flywheel. The later system uses 2. The early coil has a JEL stamp and the later is Oppama. Another indicator on the later coil is the...

Take Mark's advice and get the OEM Walbro kit. If your not familiar, dont take the carb apart until you get the kit. The reason is you have to match up the different gaskets to what your carb uses. Not all gaskets in the kit will be used.

Happy Birthday!

Things like this always make me wonder where that stuff that plugged the inlet screen came from? It wasnt in the gas. I was working on a pair of Husky blowers and because of the cost, used aftermarket carbs. In the one carb, where the brass fuel inlet brings the fuel into the carb, there...

That bearing has moved too far out of the race to accept the seal. Have you inspected the cylinder? Chances are its been drawing air there for some time. If the cylinder is good you should be able to salvage it. Rings, bearings and seals. Loctite 660 is the retaining compound we use for...

We use one of these if the bearings are stuck on the crank. Heat the bearing slightly before you begin to pull it...

You have to watch. The last couple I bought were for a pair of small Husky blowers. It was cheaper to buy a whole new China Carb rather than to buy a zama branded rebuild kit......or was it? On the first carb, the fuel inlet pipe had paper down inside of it which I didnt catch. You may...

Could you have an air leak, which means outside air is getting in somewhere allowing the engine to rev? It could be a blown out seal or a crack in the intake boot. Only other thing I thought of was if you were in there twisting the screws, could you have raised the idle speed up that far? How...

You had asked if the husky cylinder part no crosses to the poulan. Im sorry I cant say for sure.

Poulan experimented with plating pistons rather than plating cylinders in the late 70's when these engines were designed and made. If you look closely at your cylinder, you will notice that it is not chrome plated. Another reference is Mike Acres site, which shows the model 3400 with a chrome...

On the cylinder, as long as the plating is good above the exhaust port then you can re-use it. The best thing to remove aluminum from the bore is muratic acid. You can buy a small bottle at the hardware store for cleaning brick. Buy a new piston and go back to work.