Leaf Blower only runs @ half choke

2Peter119

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Unit is a Troy Built 32 cc 2-cycle. I can only keep it running with the choke partially to mostly closed. Have done the standard stuff (cleaned & rebuilt carb, new spark plug, clean air filter, new fuel lines, cleaned fuel filter, cleaned muffler screen, new fuel). Checked compression @ about 95-100 psi which seemed about right but not sure. Suspect ignition coil which checked as follows: Plug wire to Grd: 2.4 K ohms. Plug wire to positive terminal: 3.0 K ohms. Positive terminal to Grd: 0.78 K ohms. Unit initially would show problem until it ran awhile but now its continuous. Checked cylinder also: Cylinder and cylinder wall and two cylinder rings look OK. Focusing on ignition coil but sure could use some input from the Forum.
 

bogdaN

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Did U try make adjustment on carb,open up little and see what happened.Dan
 

ILENGINE

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Looks like plug wire to terminal is low. What do you get from the terminal to ground
 

Russ2251

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You have an induction issue...not electrical.

There is a tiny cup shaped micro-screen in body of carb.
Can be carefully removed with a pointed exacto blade.
This screen will clog over time and cause the problem you describe.
It is easily cleaned.
 

ILENGINE

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You have an induction issue...not electrical.

There is a tiny cup shaped micro-screen in body of carb.
Can be carefully removed with a pointed exacto blade.
This screen will clog over time and cause the problem you describe.
It is easily cleaned.

that was my first thought as well but in the original post he said that he cleaned the carb, so I am assuming that included the screen which is the reason I started looking at ignition. Some of the new ignition modules will fail and cause the same symptoms as a lack of fuel issue. the new modules on a lot of products are variable timing and have built in rev limiters. so they will go into rev limit mode at a lower than normal rpm, or put out the wrong timing on the spark will mimics a lack of fuel.
 

Russ2251

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modules will fail and cause the same symptoms as a lack of fuel issue.
I get it.

Cleaning carb is fine...but if this aforementioned screen is missed, nothing is accomplished.
 

2Peter119

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Sure appreciate the good advice. This small farm has a good number of small engine equipment and,consequently, I'm often tearing things apart. The small screen mentioned in the carb is one of the first things I check although carbs are cheap and even after putting it through my sonic cleaner a number of times then re-building it, I'm thinking of simply getting a new carb. Its either the ignition coil or carb and the a new coil can run half the cost of a whole new blower.
 

bertsmobile1

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And make sure you are using the correct plug and that the said same plug is correctly gapped.
Mower engines which run very slow ( 3600 rpm ) are not particularly fussy plug wise.
However high speed two strokes that do anything from 9000 rpm to 15000 rpm are quite a different story.
 
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