weird johnson

[gerke]

my johnson 6 hp seahorse from 1965 , ran on one cylinder yesterday , wile running i pulled one of the plugwires and nothing changed .<br />but when i held the wire close to the sparkplug (not making contact with the plug) the sparks jumped over to the sparplug and it started to run on bot cylinders again , then i put the plugwire on and it ran like it should .<br /><br />weird ain't it , what could be causing this problem .

 

[Solittle]

Re: weird johnson

Me thinks it be a time to buy some plug wires. If origonal yours are only 37 years old.

 

[JB]

Re: weird johnson

Fouled or shorted plug. When you held the wire out from the plug it didn't arc until a higher point on the voltage curve, but at the plug contacts you gave the voltage a very fast rise time. Plug cleaned itself.<br /><br />That very fast rise time is why CDI ignition works so much better than magnetos.<br /><br />I think you need to clean and gap your plugs, or maybe replace them.<br /><br />Good luck.

 

[gerke]

Re: weird johnson

thanks for your replies<br /><br />i just replaced my sparkplugs a week ago , so i don't think that is the problem .

 

[sloopy]

Re: weird johnson

what type of plugs ya use??

 

[JB]

Re: weird johnson

Gerke.<br /><br />I hate it when people Yeah-But you with info they witheld the first time.<br /><br />New electrical parts, including spark plugs, fail more often than old ones.<br /><br />If the problem comes back, switch the plugs and see if the problem follows the plug.<br /><br />Good luck.

 

[gerke]

Re: weird johnson

thanks for the info <br /><br />i'm ussing j6c champion plugs .<br />sorry to have yeah butted you jb , but i'm only human , and i didn't know that it whas important information .

 

[gerke]

Re: weird johnson

i went to take a good look at my sparkplugs this morning and i noticed the porcelin whas black , does this tell you anything ???

 

[Hooty]

Re: weird johnson

If you're talking about the porcelain being black, it means the plug is leaking. Once it gets a nice coat of carbon on the outside, the spark will follow in to ground.<br /><br />c/6<br /><br />Hooty

 

[gerke]

Re: weird johnson

hello hooty<br /><br />forgive me for my bad english , but what are you trieing to tell me .

 

[RICKRICK1]

Re: weird johnson

You need new plugs and probably new wires.

 

[gerke]

Re: weird johnson

i put on new wires , i will give it a try this weekend .

 

[gerke]

Re: weird johnson

tried the motor this morning , there whas no change ,any ideas ???

 

[Greg Lawrence]

Re: weird johnson

clean you plugs, use dielectric grease in the boots, clean your carbs, install a water seperator, check you lower unit oil, replace thermostats

 

[Greg Lawrence]

Re: weird johnson

switch the coils and see if the problem follows the coil.

 

[gerke]

Re: weird johnson

both plugs are black and everywhere where metal touches my plugwire is black too .<br /><br />but i will check all those things you told me greg .