[NegativeOne]

Re: 25 HP Mercury no spark.

[Anon136]

I did some more troubleshooting last night. more

[kita59]

I'm no professional mechanic but I think there are only a few things that control fire on both cylinders. ONe would be the neutral safety switch, another would be the kill switch, and lastly the switch box?

[Michelee]

Re: 40 hp Mercury 2 stroke no spark more

[kmac]

I have a 1990 Mercury 40 hp 2 stroke on my pontoon. It sat from July to Oct. and now no spark to the plugs. Using a test light I found spark on the top and bottom input wires of the wiring block or power pack as some say but no spark coming our to the plugs. To me this says a bad block but would like some confirmation before purchasing a new one. Anyone out there to help me. Thanks in advance for you help.

[narisseproe]

Re: 40 hp Mercury 2 stroke no spark

[Valerius]

Re: 40 hp Mercury 2 stroke no spark here

[TORNS]

Re: 40 HP Mercury 2 stroke won't fire more

[shadowdust]

I have a 2000 Mercury 40 HP 2 stroke (says Tracker on the cover) on a 18ft suntracker pb. I just got the boat and had it out about 4 times in the last 10 days. Ran great. Went to go out on Monday after a bad day at work and it would not start. The engine cranks but it will not fire. The primer bulb was not firm so I replaced with a brand new line using existing conectors. I also replaced the spark plugs and filled the tank w/ gas. It also has a new battery with a good charge.

[Mithrandir]

Re: 40 HP Mercury 2 stroke won't fire

[maye]

Re: 40 HP Mercury 2 stroke won't fire here

[sphinx24]

Disconnect the spark plug cap from the spark plug. Carefully remove the plug wire to the ignition coil from its hooks that keep it in place on the engine. Pull the plug wire out of the coil where it inserts: It's typically just pushed-in onto a spike in the coil.

[charlestaylor142]

Use a screwdriver to disconnect the coil unit from its harness, or bracket on the engine. Put the securing screws aside. Carefully pull the coil off the bracket, and then carefully disconnect the engine and vehicle wires from the coil itself. more

[yeahsam51]

Attach the ends of a multimeter to the coil connections for input and to ground, testing electrical resistance in the unit. Replace the coil unit with a new one, if the reading shows as infinity or zero. This means that there is no resistance the unit is burned out. [links]

[gjenedavidsong]

The ignition coil or module for a two-stroke engine regulates the ignition power, and converts it to charging electricity for the battery system. When the module and coil begin to fail, it's typically because the units have been burned out. The result will be an engine that performs badly, if it starts at all. Testing such units involves using a few electrical tools to gauge if the part still works, since most modules and coils are sealed with no serviceable parts. [links]