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Husqvarna 128 LD Spark Plug Problems?
#1
M
medic2575
M
medic2575
Hey Guys
Im working on the above trimmer. The gas of course sat up in it and it wouldn't start. Pulled the carb and tore it down and gaskets and diaphrams were trash and carb was dirty. Looked at a G&D kit and it was a little less than a new carb so no brainer. I replaced the carb and the thing runs like crap. The lady that owns the trimmer had just install a FastFire FF-11 new plug. Have any of you had any problems with these plugs. When I went to crank the trimmer it only boggs and backfires and I cant get it to clear up. I removed the muffler and it and the spark arrester are clean and clear. Cylinder walls are pristine. Any help or advice would be appreciated.
PS: My understanding is that this trimmer can run a Champion RCJ8Y. Is that right?
Im working on the above trimmer. The gas of course sat up in it and it wouldn't start. Pulled the carb and tore it down and gaskets and diaphrams were trash and carb was dirty. Looked at a G&D kit and it was a little less than a new carb so no brainer. I replaced the carb and the thing runs like crap. The lady that owns the trimmer had just install a FastFire FF-11 new plug. Have any of you had any problems with these plugs. When I went to crank the trimmer it only boggs and backfires and I cant get it to clear up. I removed the muffler and it and the spark arrester are clean and clear. Cylinder walls are pristine. Any help or advice would be appreciated.
PS: My understanding is that this trimmer can run a Champion RCJ8Y. Is that right?
#2
066
066
PS: My understanding is that this trimmer can run a Champion RCJ8Y. Is that right?[/QUOTE]
try a Champion RCJ6Y or NGK BPMR7A sparkplug set the gap at .5mm
try a Champion RCJ6Y or NGK BPMR7A sparkplug set the gap at .5mm
#4
M
medic2575
Hey Guys.
I tossed the Torch spark plug and put in a Champion plug and it fired right up and runs like a new one. The guy at the mower shop that's a Husqvarna dealer told me that the Torch plugs just wont run in the Husqvarna trimmers. He stated that when they get one in to their shops that wont run, run roughly or wont idle that the first thing they do id replace the torch plug and it usually fixes it.
This is just for future reference for anyone that might run into this problem in the future. Thank for the guys that responded to this thread and your willingness to help.
M
medic2575
128LD HUSQVARNA TRIMMER Manual | SearsPartsDirect see page 20 RCJ-6Y
Hey Guys.
I tossed the Torch spark plug and put in a Champion plug and it fired right up and runs like a new one. The guy at the mower shop that's a Husqvarna dealer told me that the Torch plugs just wont run in the Husqvarna trimmers. He stated that when they get one in to their shops that wont run, run roughly or wont idle that the first thing they do id replace the torch plug and it usually fixes it.
This is just for future reference for anyone that might run into this problem in the future. Thank for the guys that responded to this thread and your willingness to help.
#5
H
harcore
H
harcore
I have a 128LD trimmer and did the following to try and fix the engine from continually bogging and eventually dying. I changed or cleaned the gas, filters,spark plug, exhaust port, fuel lines, tank filter and took the carb off 3 times to try and fix this problem. I was STUMPED! After reading an obscure post somewhere on the internet, I heard that a guy would stop have problems when he hooked the trimmer to a coil tester. I also read that the trimmer would not run without a resistor spark plug. The fix for mine was to hook an alligator clip to the plug and then insert the other side in the spark plug wire. It ran perfect! I am guessing that the spark plug wire somehow interferes with the coil or ignition system. I would try this first if having problems with this trimmer dying. It is easy and will save you a lot of headache! now to figure out how to get it running without an alligator clip on it. :wink:
#6
B
bertsmobile1
B
bertsmobile1
Small hand deld engines run at crazy speeds.
So they are very sensitive to both the grade of plug used and the gap.
Almost no one ever bothers to check the gap and new plugs may not be gapped correctly for your engine.
I only fit NGK Champion or Bosch plugs and have found Champions tend to run better in 2 stroke hand held engines.
So over the years I have not been reordering NGK 2 stroke plugs or Champion 4 stroke plugs.
So they are very sensitive to both the grade of plug used and the gap.
Almost no one ever bothers to check the gap and new plugs may not be gapped correctly for your engine.
I only fit NGK Champion or Bosch plugs and have found Champions tend to run better in 2 stroke hand held engines.
So over the years I have not been reordering NGK 2 stroke plugs or Champion 4 stroke plugs.
#7
primerbulb120
primerbulb120
Bert, I've had excellent results with Champion in both 2 and 4 cycle applications. Curious as to why you are not using Champion in the 4 cycles?
I've had the most failures overall with NGK. Particularly in Echo blowers and Honda GC/GCV series engines.
I've had the most failures overall with NGK. Particularly in Echo blowers and Honda GC/GCV series engines.
#8
primerbulb120
Husqvarna 128LD's have problematic ignition systems. I've had more ignition related issues with these than on any of the other common 2 cycles. Sometimes it's the coil itself, sometimes the spark plug, sometimes the coil wire, occasionally the stop switch, and often two or three of the above items. And yes, the problem will often magically disappear when I connect something between the coil and plug (usually my spark tester.)
Unfortunately I don't have a clear diagnostic pattern for you. I have enough good used parts that I just replace things till the problem goes away. The main point of my post is that any of the ignition components could be causing the issue.
primerbulb120
I have a 128LD trimmer and did the following to try and fix the engine from continually bogging and eventually dying. I changed or cleaned the gas, filters,spark plug, exhaust port, fuel lines, tank filter and took the carb off 3 times to try and fix this problem. I was STUMPED! After reading an obscure post somewhere on the internet, I heard that a guy would stop have problems when he hooked the trimmer to a coil tester. I also read that the trimmer would not run without a resistor spark plug. The fix for mine was to hook an alligator clip to the plug and then insert the other side in the spark plug wire. It ran perfect! I am guessing that the spark plug wire somehow interferes with the coil or ignition system. I would try this first if having problems with this trimmer dying. It is easy and will save you a lot of headache! now to figure out how to get it running without an alligator clip on it. :wink:
Husqvarna 128LD's have problematic ignition systems. I've had more ignition related issues with these than on any of the other common 2 cycles. Sometimes it's the coil itself, sometimes the spark plug, sometimes the coil wire, occasionally the stop switch, and often two or three of the above items. And yes, the problem will often magically disappear when I connect something between the coil and plug (usually my spark tester.)
Unfortunately I don't have a clear diagnostic pattern for you. I have enough good used parts that I just replace things till the problem goes away. The main point of my post is that any of the ignition components could be causing the issue.
#9
B
bertsmobile1
When I kicked off I inherited a box with about 50 plugs in it.
So I bought a Stens Champion plug deal .
450 spark plugs that were popular 20 years ago with free dispensor, and needless to say I still have 2/3 of them left.
Then RGS did a deal on NGK's similar 340 plugs + dispensor, good thing is these plugs mostly were the ones I actually needed.
SO slowly I am widening the range , no need to keep equivalent plugs & I am conversant with NGK nomenclature so have no troubles finding a slightly hotter / colder plug.
The Bosch came in a deal at a swap meet, again with a dispensor.
Looks good on the wall and I have to buy Champions is 4's & NGK's in 10's to get wholesale pricing so it keeps the extras nicely sorted.
B
bertsmobile1
Bert, I've had excellent results with Champion in both 2 and 4 cycle applications. Curious as to why you are not using Champion in the 4 cycles?
I've had the most failures overall with NGK. Particularly in Echo blowers and Honda GC/GCV series engines.
When I kicked off I inherited a box with about 50 plugs in it.
So I bought a Stens Champion plug deal .
450 spark plugs that were popular 20 years ago with free dispensor, and needless to say I still have 2/3 of them left.
Then RGS did a deal on NGK's similar 340 plugs + dispensor, good thing is these plugs mostly were the ones I actually needed.
SO slowly I am widening the range , no need to keep equivalent plugs & I am conversant with NGK nomenclature so have no troubles finding a slightly hotter / colder plug.
The Bosch came in a deal at a swap meet, again with a dispensor.
Looks good on the wall and I have to buy Champions is 4's & NGK's in 10's to get wholesale pricing so it keeps the extras nicely sorted.
#10
I
ILENGINE
I have had the opposite issues. I won't touch a Champion unless I don't have other options. Having to deal with 50 bad plugs in one day tends to sour your opinion on a brand. I have had a few issues with the BPMR7A failing a few minutes after installation in a few saws and trimmers but nothing like Champion failures.
I
ILENGINE
Bert, I've had excellent results with Champion in both 2 and 4 cycle applications. Curious as to why you are not using Champion in the 4 cycles?
I've had the most failures overall with NGK. Particularly in Echo blowers and Honda GC/GCV series engines.
I have had the opposite issues. I won't touch a Champion unless I don't have other options. Having to deal with 50 bad plugs in one day tends to sour your opinion on a brand. I have had a few issues with the BPMR7A failing a few minutes after installation in a few saws and trimmers but nothing like Champion failures.
#11
B
bertsmobile1
B
bertsmobile1
One of the good things about being born into a dirt poor family is you get forced to work in all sorts of places.
One of them was the Champion factory in Sydney which was here to make plugs for British Leyland., General Motors & Ford.
To my surprise they made every brand of spark plug.
They all came out of the same machines.
Apparently in Melbourne the spark plug factory there did the same & supplied Ford & Toyota
Why ?
Because 50 years ago the profits in making spark plugs were less than the freight cost shifting them 1000 km.
Now back then a spark plug was around an hours wages and the machine made them all we did was to feed in the raw materials & pack the different brand plugs into different cartons.
Fifty years on and a spark plug is about 10 minutes wages and everything that gets feed into the machine has gone up in price by several factors of 10 so the profit in a plug would be lucky to be 1¢ a plug.
The machine that makes them tests each & every plug and from the results the plugs got graded and dropped into different stillages to go into the next machine which printed the name & grade on the plug.
All it takes is the wrong stillage to be feed into the printer and you get a full batch of bad plugs.
Add to that NGK's no longer are glazed on the nose to reduce the Pb emissions from the engine , then factor in that new "fuels" are conductive at combustion pressures and you have the receipe for mass plug failure.
Because there is so little profit in std plugs, the plug factories really don't care about them as all the profit is in the rare metal $ 20 to $ 50 plugs.
So they loose money on standard plugs in order to make big profits on the exotic plugs.
Several years latter I was weekend manager at a car wash / petrol station.
The workshop was leased out to a mechanic who did mainly muscle cars as the site had a dyno.
He had a plug tester and would open a dozen or more plug boxes testing each one till he got a matched set of 8, tossing each "dud" plug in the bin ( while the customer was watching ).
latter the apprentice would clean & regap the "dud" plugs & put them back in their boxes.
Thus I have no brand loyality when it comes to plugs, it is just I understand NGK's naming system quit well so can pop a slightly hotter plug in an engine that is starting to burn oil & foul.
What I did learn was the best plugs went into the single branded boxes and the worst plugs went into the 4,6 or 8 plug bubble packs with the big box stores brand name on them.
One of them was the Champion factory in Sydney which was here to make plugs for British Leyland., General Motors & Ford.
To my surprise they made every brand of spark plug.
They all came out of the same machines.
Apparently in Melbourne the spark plug factory there did the same & supplied Ford & Toyota
Why ?
Because 50 years ago the profits in making spark plugs were less than the freight cost shifting them 1000 km.
Now back then a spark plug was around an hours wages and the machine made them all we did was to feed in the raw materials & pack the different brand plugs into different cartons.
Fifty years on and a spark plug is about 10 minutes wages and everything that gets feed into the machine has gone up in price by several factors of 10 so the profit in a plug would be lucky to be 1¢ a plug.
The machine that makes them tests each & every plug and from the results the plugs got graded and dropped into different stillages to go into the next machine which printed the name & grade on the plug.
All it takes is the wrong stillage to be feed into the printer and you get a full batch of bad plugs.
Add to that NGK's no longer are glazed on the nose to reduce the Pb emissions from the engine , then factor in that new "fuels" are conductive at combustion pressures and you have the receipe for mass plug failure.
Because there is so little profit in std plugs, the plug factories really don't care about them as all the profit is in the rare metal $ 20 to $ 50 plugs.
So they loose money on standard plugs in order to make big profits on the exotic plugs.
Several years latter I was weekend manager at a car wash / petrol station.
The workshop was leased out to a mechanic who did mainly muscle cars as the site had a dyno.
He had a plug tester and would open a dozen or more plug boxes testing each one till he got a matched set of 8, tossing each "dud" plug in the bin ( while the customer was watching ).
latter the apprentice would clean & regap the "dud" plugs & put them back in their boxes.
Thus I have no brand loyality when it comes to plugs, it is just I understand NGK's naming system quit well so can pop a slightly hotter plug in an engine that is starting to burn oil & foul.
What I did learn was the best plugs went into the single branded boxes and the worst plugs went into the 4,6 or 8 plug bubble packs with the big box stores brand name on them.