Air/fuel mixture incorrect: Idle air screw mis-set. can any one help? I can't seem to find anybody that know how to hook up the two wires from the ignition coil, red and black. 2 Stroke no spark help? 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. Spark plug cap not in good contact with spark plug. 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. Posts: 9,551. Post by Vitoow » Sun Dec 20, 2020 6:38 pm. I swapped the coil and plugs out and still no spark! Any help will be much appreciated! I have a 2 stroke geely that dont have any spark, I changed the coil and stator with another one and still no spark? To help you in your search, we have completed this list of the Best 2 Stroke Spark Plug. Re: Need help! 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. Registered: ‎07-14-2011. Want Answer 0. Click here to read more. Strong Spark 4. 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 Admiral. No spark; weak spark: Spark plug fouled, broken, or misgapped. The stator is relatively new about 4 months old. Top 10 Best 2 Stroke Spark Plug It is damaging and not necessary. Hey guys first time poster here. Engine turns over just fine. High voltage is then generated in the coil windings. Faulty or damaged coils will have weak or no output. Mercury 115 inline won't start, no spark. The engine will run clean sometimes and then sputters and backfires and quits. Clean Air 3. Diagnosing no spark on a Lawnmower engine. I did. Receiving voltage from the CDI unit the coil will amplify voltage and shoot it through to the spark plug. OK, thanks for the reassurance. Spark plug cap or high tension wiring faulty. The ignition coil or module for a two-stroke engine regulates the ignition power, and converts it to charging electricity for the battery system. This led to a marked reduction in spark plug fouling, which had previously been a problem in two-stroke engines. from the bottom dead center to the top dead center. 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. 0 Kudos BluewaterBill. Still no spark on either plug. Derbi) which use the same ignition. Disconnected the kill switch to check for short. no spark on Victa lawnmower 2 stroke? 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. To start viewing messages, select the forum that you want to visit from the selection below. I disconnected tha battery, nothing. In this two stroke engine, only air is compressed inside the cylinder. I noticed a bunch of corrosion on the spark plug cables, so I decided to pull them and clean them. took the old plug and gapped it about a quarter inch and not a spark. If it sparks then it is the fixing at the control plate that is earthing out. Engine stop switch stuck closed. No spark at all tends to indicate that the power is not getting to the points. Having problems with your 2 stroke bicycle engine? Magneto damaged. Message 6 of 13 (27,138 Views) Reply. I disconnected the wires at the box, and checked spark at all 6 cylinders. 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. They are very light and the 2 stroke engines run at high speed. Here is what I have done so far. 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. The ethanol that is added to our gas nowadays is one of the biggest culprits. If you are pulling a start cord you don’t have a battery. I have replaced the spark plug so its not the plug. The spark seems somewhat weak. Ignition Module Failure. While moving up, it compresses the air-fuel mixture in the combustion chamber. I bypassed the kill switch thinking it may have corroded the kill switch, but still no spark. Compression (around at least 90 PSI on a 2 stroke like yours) 2. It was running fine with the water hose attached when it started over revving. No spark. Just this weekend I was working on my '91 Kawasaki 550. Was running Awesome!! It's assumed you have and know how to work a multimeter! 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. 2 Stroke Trouble Shooting Guide; 2 Stroke Trouble Shooting Guide. 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. I’ve got a 2012 115 Yamaha four stroke. The remaining operations of the two stroke compression ignition engine are exactly the same. Modern replacements are heavy and expensive. There is the battery driven and the engines without batteries. I have a 2000 Yamaha 2 stroke that has run flawlesly since I bought it two years ago. Got a 2010 250 exc... my bike decided to just stop.workong after riding one day. Had spark on all cylinders except 3 and 5. I have been through the carb twice and I think it is ok. There is no spark plug in this engine. The motor started and ran fine days before this. Rod October 2008: It sounds almost as if the position of the coil, in relation to the flywheel has been fractionally adjusted. and tried to start it but there was no spark. The upward movement of the piston creates a partial vacuum in the crankcase. BUT on my 2 stroke Victa there is no flywheel key. thanks Posted by tony evans on Aug 24, 2013. Cleaned the carbs etc. 8. Loose wire connector. 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. Other two-stroke engines might pump lubrication from a separate tank of two-stroke oil. You may have to register before you can post: click the register link above to proceed. Went through and found I had no spark. Does this mower have a condenser? CDI unit faulty. Pull the cord, cord jams half way (or pulls back), no spark because the flywheel isn't spinning fast enough to produce electricity through the magneto (coil). Suzuki 2-Strokes: Gt550 1973. ... Answer: 2-stroke engines don't have a sump (reservoir) containing oil. Since then i have spent hours upon hours trying to get it to spark with no luck. 1. Your machine has to HAVE these things to Start and to Run 1. I am troubleshooting issues with my 2002 YZ125 tha was recently rebuilt. If this fails then there exists the possibility the ignition moduel is at fault. I think there are problems with the ignition. Crank, no start. I ordered a 49cc 2 stroke engine off of ebay about three weeks ago. Testing for a spark. Once you have confirmed that the stop switch is working, reconnect the spark plug lead. I took off both spark plug cables and it continued to rev. Because the ignition module is electronic and does not utilize moving components, it is normally one of the most reliable part of the engine. What causes this? When the module and coil begin to fail, it's typically because the units have been burned out. I haven't started it it in over a year. 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. Last weekend it would not start. 2 stroke engine.. no spark; If this is your first visit, be sure to check out the FAQ by clicking the link above. All 50cc Piaggio and Gilera 2-stroke engines plus some geared 50cc (e.g. and the fuel (diesel) is injected by an injector fitted in the head of the cylinder. I dunked my 57" Arrow Shark Fighter Cat and got it running again, but only for about 5 minutes then it died. On any other lawnmower this suggest that the flywheel key has sheared. Our machines ran FINE without it and no small engine likes it. Check power to the points as indicated by the previous posts. How do i get spark. The result will be an engine that performs badly, if it starts at all. GT500 no spark. The engines then turn easily and the plug can be earthed to the cylinder and the starter rope pulled. 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. That is I remove the plugs. So I decided to do some preventative maintenance on my 20 hp Merc. I have no spark on my Victa corsair 2 stroke lawnmower. Often a faulty CDI unit will see intermittent or no spark on cylinders and may only breakdown when your engine warms up. 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! 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 hit the stop button but nothing happened. With no external signal to the coil negative primary post, voltage would travel through the ignition coil windings without inducing any secondary spark. Typically, this problem happens when the contact points become worn, or more precisely when the contact point's heel becomes worn. Ignition Coil. 97 Mercury 20 HP 2-stroke NO SPARK June 25th, 2018, 06:32 AM. There are two different types of ignition and electrical systems on lawnmowers. A switch, or signaling device, triggers an interruption in the circuit. If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. i am putting the NEW spark plug against the head,frame,and shock and nothing. The Flymos have no numbers. Ignition coil faulty. The overwhelming majority of two stroke engines have spark plugs. 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