40 hp 4 cyl switch box or stator

[chaser357]

I have a mid '90s 40hp 4 cyl mercury on a basstracker and it has lost spark to cylinders 1 and 2. I have swapped the coils around and the problem stayed with 1 and 2. How do I test and see if I need to replace the switch box or the stator. I have read about these motors having lots of problems with the black stators. I just got this boat and have never done any work on it so far except for replacing gaskets in the carbs so I dont know which stator it has. Thanks for all your help in advance.

 

[Barnacle_Bill]

Re: 40 hp 4 cyl switch box or stator

You can do some testing on the stator with an ohm meter and a manual. But to do it properly you will need a DVA (direct voltage adaptor).

 

[achris]

Re: 40 hp 4 cyl switch box or stator

Losing spark on 1 and 2 sounds more like a trigger, than a switchbox or stator... But as bhile said, get a DVA. Or if you a handy with a soldering iron, save yourself $100+ and make it...

See THIS thread for details. (parts only cost about $6)

Chris......

 

[Maxz695]

Re: 40 hp 4 cyl switch box or stator

I have a mid '90s 40hp 4 cyl mercury on a basstracker and it has lost spark to cylinders 1 and 2. I have swapped the coils around and the problem stayed with 1 and 2. How do I test and see if I need to replace the switch box or the stator. I have read about these motors having lots of problems with the black stators. I just got this boat and have never done any work on it so far except for replacing gaskets in the carbs so I dont know which stator it has. Thanks for all your help in advance.

sounds like the switchbox I had a problem with 1 cyl not firing on a 2 stroke 40 HP I replaced the switchbox and it worked great after that see my second responss for extra parts on the 4 cyl 4 stroke 1997

 

[Maxz695]

Re: 40 hp 4 cyl switch box or stator

I have a mid '90s 40hp 4 cyl mercury on a basstracker and it has lost spark to cylinders 1 and 2. I have swapped the coils around and the problem stayed with 1 and 2. How do I test and see if I need to replace the switch box or the stator. I have read about these motors having lots of problems with the black stators. I just got this boat and have never done any work on it so far except for replacing gaskets in the carbs so I dont know which stator it has. Thanks for all your help in advance.

1997 Mercury Stator W/ Flywheel 40 hp *Misc Prts Bonus On eBay 95.00 no trigger but 1 stator 1 flywheel 3 coils and more 1997 4 cyl 4 stroke good working condition. My seller name is xcontender1x Type item number 330538684159 to see the add on eBay also it has oil pump and other electrical parts for the engine all in the same add View attachment 86046View attachment 86047

 

[Laddies]

Re: 40 hp 4 cyl switch box or stator

With the type of problem you have a simple check for the stator is go to the switch box swap the red with red/white wires and the blue with the blue/white and retest for spark if it stays the same its the box or trigger, if it changes to the other cyls. it's the stator. The trigger can be checked by swapping wires from 1 with 3 and 2 with 4 also