Question about Echo Inc. 25.4 CC Backpack Blower

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After getting hot the blower will blow very hard at full throttle and then loose power and then back to full throttle after 2-3 seconds. It does not do this when it first starts off cold. I have relaced the air filter and spark plug. What else could be the problem?

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  • 486 Answers

Basics to check:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled
b) is there spark

2) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated
3) Check cylinder compression



Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

Posted on Nov 16, 2009

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1 Answer

Why is there no power to A/C control panel?


no less than 6 related posts.

2.5L or 4.0L engine?>

why not post the full symptoms. and year of car.

if i read all 28 days of posts, i see its a 1988 !

and books on that old dog are hard to find (sold mine)

had 2 , 1988s, matching pair, xj and Comanche.

drove them to death. 500k total, miles.

I know 88s very well, too.

the problem is finding facts on this relic, french ECU car.

but it's online, at mitchells and alldata. and others

to work on this old car, why not get a $15 subscription to mitchells, DIY.

and not work blind and in the dark.



so ill help you.

A/c Dead or more clearly the panel is dead.

doe that mean just a lamp dead, but a/c works or not

why not post all that works and does not.

does car drive ok day and night??????

anything else dead?

ok i see post 5 says everything else is fine

but then says, heat is dead.

but does the blower blow?

helping you with such sparse 1 liners. is near impossible

try this, put a full question in a text file with notepad.

then past it here.

like this.

Hello: my blower is dead, in dash why?

or blower good and heat dead, but engine is 180f , why.

or blower dead and heat dead parked, but work moving

that is in fresh air vent mode, i get heat and a/c

my A/c clutch on my compressor, is active or not.

works or not./??



ive lots of questions, here ill ask them

does the heater fan (blower) blow on HIGH/.??

yes/no.?

no, blower fuse 25amps blown open

yes, but not low speed, then blower resistor block , burned out.



does the heater water valve open and close proper

with dash temperature lever action ( takes a hand vacuum tool to test this......!!!)



lets work heat. since that is 10x more easy than A/C

1: engine hot, 180F +?

2: water valve opens, with lever? sends hot water to core in cab.

3: both core hose get real hot 180f hot? yes/no

4: does fan blow on high? yes/no

5: ever flush the core out. so it clean inside,

do so at ends of hoses, not at core. or damage is easy to happen there. (ask why and how)

ends means engine side.



6: do the dampers move correctly via cables and vacuum.





you said no power to panel, please say what that means.

blower dead or what?>


26116380-j20myofaln1gqogheslpolee-3-0.jpg



this is the vacuum operated hot water valve.

easy to test, heat off , it goes closed, heat max

it opens max. can be seen to work, see lever below?


26116380-j20myofaln1gqogheslpolee-3-1.jpg



this vacuum slave actuator (called motor , by motor heads)

must move when you slect modes, if not say so. ask for tests.


26116380-j20myofaln1gqogheslpolee-3-3.jpg



and last the HVAC drawing. to arrow is fuse. blow.

bottom arrow is P , for clutch.


26116380-j20myofaln1gqogheslpolee-3-6.jpg



tell more get more

1 lines symptoms are no good.

tell the full story. and WIN!

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You still have problems in the carb highspeed circuit..some debris in the passages...
BE SURE TO USE COMPRESSED AIR TO BLOW OUT THE CARB.
(be sure to watch the inlet valve seat, you can loose it and not even know it) Blow the carb clean in a box or something that will contain any part that may be expelled during cleaning.
Please take time to rate me
Bud

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The resistor will get hot under normal conditions because the resistance is how the motor speed is controlled.
So you are probably right the motor is failing.
You could get a new motor and hook it up without installing it to compare.

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Stilh leaf blower and it surges


How old is it?

Your brief description of the problem points toward air in the fuel lines.

Remove the engine cover, and try to see how flexible the fuel lines are. If they are hard and brittle, it's time to change them.

If you need further assistance let me know.

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