If this fails then there exists the possibility the ignition moduel is at fault. Want Answer 0. The Flymos have no numbers. Compression (around at least 90 PSI on a 2 stroke like yours) 2. I swapped the coil and plugs out and still no spark! Once you have confirmed that the stop switch is working, reconnect the spark plug lead. Hey guys first time poster here. Spark plug cap not in good contact with spark plug. Magneto damaged. Ignition Coil. No spark, no voltage going to the coil packs when cranking. I hit the stop button but nothing happened. Just this weekend I was working on my '91 Kawasaki 550. GT500 no spark. Last weekend it would not start. Got a 2010 250 exc... my bike decided to just stop.workong after riding one day. If you are pulling a start cord you don’t have a battery. There are two different types of ignition and electrical systems on lawnmowers. I dunked my 57" Arrow Shark Fighter Cat and got it running again, but only for about 5 minutes then it died. Registered: ‎07-14-2011. Spark plug cap or high tension wiring faulty. 2 Stroke no spark help? It was running fine with the water hose attached when it started over revving. The stator is relatively new about 4 months old. The result will be an engine that performs badly, if it starts at all. This led to a marked reduction in spark plug fouling, which had previously been a problem in two-stroke engines. This problem can only happen on a 2-stroke because there are no valves to be operated in a set sequence, as in a 4-stroke engine. I agree with tester, spark plug should be checked first, then the compression and or carb, the filters (air and fuel)...if you aren't getting a spark then the spark plug needs replacement have the dudes at your 2 stroke engine repair place show you the correct gap, how to clean the thingys that make the gap as they get gooed quickly, only use NO ETHANOL gas! Other two-stroke engines might pump lubrication from a separate tank of two-stroke oil. Hello this is my first post so if i'm missing crucial information please let me know, I bought a GT500 awhile back and i finnaly got the time to try and fire it up. Post by Vitoow » Sun Dec 20, 2020 6:38 pm. took the old plug and gapped it about a quarter inch and not a spark. Ignition Module Failure. I have a 90 hp Yamaha 2 stroke .I replaced the cdi and i have no spark on cylinder 2&3 .I think the coils are bad #1 is firing so I switched coils and now no fire on 1.But I can take the 2&3 wires fro … read more Strong Spark 4. I cranked her over, she sounded like she wanted too, shot a small spray of starting fluid in there and she fired right up, then had spark on all 6. i have a 2 stroke chainsaw motor on a little pocket bike i cleaned ALL connections and when i turn it over the wire will give me a pretty good shock if im up against the frame. 0 Kudos BluewaterBill. Check power to the points as indicated by the previous posts. To help you in your search, we have completed this list of the Best 2 Stroke Spark Plug. All 50cc Piaggio and Gilera 2-stroke engines plus some geared 50cc (e.g. Suzuki 2-Strokes: Gt550 1973. Message 6 of 13 (27,138 Views) Reply. It's assumed you have and know how to work a multimeter! Was running Awesome!! I have replaced the spark plug so its not the plug. Diagnosing no spark on a Lawnmower engine. Because the ignition module is electronic and does not utilize moving components, it is normally one of the most reliable part of the engine. I have a 2000 Yamaha 2 stroke that has run flawlesly since I bought it two years ago. If there's no sign of a spark, try a new one or even a plug from a lawn mower (to test the ignition circuit is okay) before you attempt any more in depth troubleshooting. 8. thanks Posted by tony evans on Aug 24, 2013. With all those washers and things, it's not hard to connect the points wires in a way that they either short out or don't make a connection. Still no spark on either plug. Rod October 2008: It sounds almost as if the position of the coil, in relation to the flywheel has been fractionally adjusted. Testing for a spark. Click here to read more. can any one help? If it sparks then it is the fixing at the control plate that is earthing out. There is the battery driven and the engines without batteries. I think there are problems with the ignition. If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. I did. Two-stroke oils, which became available in the 1970s, are specifically designed to mix with petrol and be burnt with minimal unburnt oil or ash. Modern replacements are heavy and expensive. Re: Need help! Since then i have spent hours upon hours trying to get it to spark with no luck. The upward movement of the piston creates a partial vacuum in the crankcase. Engine turns over just fine. Receiving voltage from the CDI unit the coil will amplify voltage and shoot it through to the spark plug. CDI unit faulty. The best option is to use a spark tester which plugs into the spark plug lead (instead of the plug) and is clipped to an earth point on the moped engine. Rest assure, by following this trouble shooting guide, ... No Spark: 4: Check blue and black wire connections coming from motor to the connections to CDI module. I have been through the carb twice and I think it is ok. With no external signal to the coil negative primary post, voltage would travel through the ignition coil windings without inducing any secondary spark. 2 Stroke Trouble Shooting Guide; 2 Stroke Trouble Shooting Guide. OK, thanks for the reassurance. A switch, or signaling device, triggers an interruption in the circuit. If you are looking for top quality Best 2 Stroke Spark Plug, read the detailed reviews on top 10 Best 2 Stroke Spark Plug before buying. Our machines ran FINE without it and no small engine likes it. as those of the spark ignition engine. The remaining operations of the two stroke compression ignition engine are exactly the same. from the bottom dead center to the top dead center. I disconnected the wires at the box, and checked spark at all 6 cylinders. I can't seem to find anybody that know how to hook up the two wires from the ignition coil, red and black. If no spark you'll have to remove the blower housing and check the ground wire back to the coil, checking that it is not shorting along the way. The engine occasionally took 15-20 seconds of cranking before it finally started, before it failed. Posts: 9,551. I have a 2 stroke geely that dont have any spark, I changed the coil and stator with another one and still no spark? How do i get spark. The motor started and ran fine days before this. Your machine has to HAVE these things to Start and to Run 1. On any other lawnmower this suggest that the flywheel key has sheared. Engine stop switch stuck closed. Does this mower have a condenser? Mercury 115 inline won't start, no spark. I haven't started it it in over a year. i am putting the NEW spark plug against the head,frame,and shock and nothing. That is I remove the plugs. When the module and coil begin to fail, it's typically because the units have been burned out. You may have to register before you can post: click the register link above to proceed. The engines then turn easily and the plug can be earthed to the cylinder and the starter rope pulled. They are very light and the 2 stroke engines run at high speed. Went through and found I had no spark. Faulty or damaged coils will have weak or no output. What causes this? Upward Stroke in 2 Stroke Spark Ignition Cycle: During upward stroke of a 2 stroke spark ignition cycle, the piston moves upward i.e. The ethanol that is added to our gas nowadays is one of the biggest culprits. Any help will be much appreciated! and tried to start it but there was no spark. Derbi) which use the same ignition. Typically, this problem happens when the contact points become worn, or more precisely when the contact point's heel becomes worn. and the fuel (diesel) is injected by an injector fitted in the head of the cylinder. I have two 89 225 o.m.c sea drive i have no spark from the spark plugs and i did all i know how to do and to them Report Inappropriate Content. I am troubleshooting issues with my 2002 YZ125 tha was recently rebuilt. Here is what I have done so far. There is no spark plug in this engine. The overwhelming majority of two stroke engines have spark plugs. no spark on Victa lawnmower 2 stroke? So I decided to do some preventative maintenance on my 20 hp Merc. I bypassed the kill switch thinking it may have corroded the kill switch, but still no spark. I noticed a bunch of corrosion on the spark plug cables, so I decided to pull them and clean them. It's getting fuel, but no spark. Hi My huskvarna wr 250 two stroke has no spark to the spark plug I have tried disconnecting the kill switch and have checked the wiring and have a new spark plug what else can I try. I have no spark on my Victa corsair 2 stroke lawnmower. In this two stroke engine, only air is compressed inside the cylinder. Had spark on all cylinders except 3 and 5. Air/fuel mixture incorrect: Idle air screw mis-set. BUT on my 2 stroke Victa there is no flywheel key. Loose wire connector. 1. Top 10 Best 2 Stroke Spark Plug Having problems with your 2 stroke bicycle engine? The engine will run clean sometimes and then sputters and backfires and quits. High voltage is then generated in the coil windings. I’ve got a 2012 115 Yamaha four stroke. While moving up, it compresses the air-fuel mixture in the combustion chamber. Admiral. ... Answer: 2-stroke engines don't have a sump (reservoir) containing oil. No spark; weak spark: Spark plug fouled, broken, or misgapped. 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