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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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aldi portable generator no spark
hi am looking for some advice , trying to get generator started but there is no spark at plug, all leads seem to be fine , only thing i noticed that might be wrong is the capacitor , capacitor seems to have big lump in it which seems to me that it may be burned out , question is would this stop the plug from sparking ? any advice welcome .
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#2
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aldi portable generator no spark
Sandy Taylor wrote:
hi am looking for some advice , trying to get generator started but there is no spark at plug, all leads seem to be fine , only thing i noticed that might be wrong is the capacitor , capacitor seems to have big lump in it which seems to me that it may be burned out , question is would this stop the plug from sparking ? any advice welcome . Very likely. No capacitor I've come across has had a deliberate bulge on it and bulges are often related to an internal fault. Used to be the sort of thing that car spares places would stock but maybe less common now that most modern cars don't use Kettering ignition systems. A garden machinery repair/spares place might be more appropriate. |
#3
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aldi portable generator no spark
On 09/01/2014 13:32, Bob Minchin wrote:
Sandy Taylor wrote: hi am looking for some advice , trying to get generator started but there is no spark at plug, all leads seem to be fine , only thing i noticed that might be wrong is the capacitor , capacitor seems to have big lump in it which seems to me that it may be burned out , question is would this stop the plug from sparking ? any advice welcome . Very likely. No capacitor I've come across has had a deliberate bulge on it and bulges are often related to an internal fault. Used to be the sort of thing that car spares places would stock but maybe less common now that most modern cars don't use Kettering ignition systems. A garden machinery repair/spares place might be more appropriate. Agree about the bulge. Not sure how "modern" stuff like this makes its spark, in "old" systems with a flywheel magneto there was a set of points to break the induced current in the primary, and the capacitor served the traditional purpose of suppressing arcing. In which case removing it temporarily would confirm if it was the problem without any risk. But maybe it does something else in a solid state "magneto"? |
#4
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aldi portable generator no spark
"newshound" wrote in message
news On 09/01/2014 13:32, Bob Minchin wrote: Agree about the bulge. Not sure how "modern" stuff like this makes its spark, in "old" systems with a flywheel magneto there was a set of points to break the induced current in the primary, and the capacitor served the traditional purpose of suppressing arcing. In which case removing it temporarily would confirm if it was the problem without any risk. But maybe it does something else in a solid state "magneto"? i'd imagine the capacitor is part of the 'regulation' for the alternator's output, the spark will be produced a typical one piece ignition coil found in small engines, it's next to the outside of the flywheel, follow the HT lead back from the spark plug to find it, tho' it should be obvious... looks sort of like a capital letter A, made of laminated iron, think transformer core, upper half is smaller than the lower half, around the bar of the A is the winding.... almost always potted and black, lower half of the A goes towards the flywheel and the bottom of the legs of the A are profiled to follow the flywheels curve. no points, condensers or other external triggers, it just fires off a spark when the magnet in the flywheel goes past it, only connections will be the fat HT wire to the plug, and a thin wire going to the kill switch, other side of the kill switch is to earth, so earthing the thin wire kills the spark, very little to go wrong with them... bad earth of the iron core, sometimes there's an extra but short small wire to a ring terminal that goes under one of the bolts, corrosion could have made that high resistance, The gap between the lower part of the A and the flywheel sets the timing, it's a few thou, but unless you've been playing and have moved it well away from the flywheel (iron A has elongated mounting holes) it should still produce a spark, Of course the winding may be open circuit, or the joint to the HT lead duff, but usual test is replacement after you are sure the spark kill wire is not earthed inadvertently. Just one thought, are you still running the original spark plug and using the plug to test for the spark? few years ago i bought a cheap chinese 1/5 scale radio controlled buggy with a 22cc petrol engine in it (typical strimmer type engine) knock off of the FG 1/4 scale marder buggy that sold for over a grand. it ran for about 2 tank full's of petrol then died, i pulled the spark plug out, grounded it, and saw no spark, then proceeded to dismantle the flywheel/fan cover, checked the engine kill switch was working and not stuck shut (momentary push button, hold it in until engine is fully stopped) but it was fine, so i took the ignition coil off and checked it's resistance, re-set the gap, still no spark, Then i got a belt whilst pulling the starter cord and holding the HT lead to hold the plug hard against the head, bloody cheap **** 'torch' brand spark plug had gone, apparently it was the internal resistor in the plug that goes due to crap manufacture, Put an NGK plug in, and it still running fine 5 years later. |
#5
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aldi portable generator no spark
I have Aldi workzone 2200W (peak) inverter gen, Very weak spark. Removed tank and discovered totally different ignition system now being used. EHT coil designed for flywheel now fed direct current from Gen? at pull start. I suspect timing is done by a pickup miniature coil on top of gen housing. I replaced little used oil ,in case this was a sensed problem. Cant remove earth on this type arrangement. Will start by replacing EHT coil bolted on top under fuel tank. Question, where do I get one in Gympie Queensland,
-- For full context, visit https://www.homeownershub.com/uk-diy...rk-948160-.htm |
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