plug gap?

[suzuki40]

1979 4 hp johnson seahorse. #4w79d<br />I need to know what the spark plug gap is?<br /><br />Thanks,<br />Suzuki40

 

[OBJ]

Re: plug gap?

Hi again Suzuki...<br /><br />Use a .030 gap if your using the recommended champion plug.

 

[suzuki40]

Re: plug gap?

Thanks for answering my post again Jim. <br />I have been running this motor for two years with Champion plugs # L77JC4 I dont know if this is the plugs that are recommended for it? But it starts first pull and runs great all day. I did notice the top cylinder plug was oily(not bad). and the bottom cylinder plug was a perfect tan color and clean. Should I worry about this?<br /><br />Thanks,<br /> Suzuki40

 

[bubbakat]

Re: plug gap?

my book says 1977 thru 1987 QL86C OR L86C<br /> GAP @ 30

 

[OBJ]

Re: plug gap?

Hey bubba...is that an uptodate book ya' got there? My part smart says L77JC4????!!!! HMMMMM.<br />Guess I'd better take a look when I back to the shop. Maybe my Part Smart is Part Dumb

 

[rickdb1boat]

Re: plug gap?

OBJ, Got the same thing as Bubba got here...<br /><br /> www.boatsetup.com/SparkPlugChart

 

[OBJ]

Re: plug gap?

OK...thanks Rick. Shows ya' how dumb I am....had the darn site in my list of favorites and forgot about it. Duh Huh!!

 

[bubbakat]

Re: plug gap?

Thats alright jim when rick and I reach your age we'll prob lose a little in the memory lane to

 

[suzuki40]

Re: plug gap?

Ok fells? Whats the verdict? I have been running this Champion L77JC4 for a long time. Whats the differance? heat range? hotter spark? what?<br />Im going to the Champion QL86C because that's what the book calls for. Me running that other plug didnt hurt anything did it?<br /><br />Suzuki40

 

[OBJ]

Re: plug gap?

Didn't hurt nothin' Suzuki. Actually, you can run with either the QL77JC4 or the QL86C. The "86" is a little hotter. Both are resistor type plugs.

 

[suzuki40]

Re: plug gap?

OBJ, Thanks, Hotter plug I guess burns better? ( more effencant combustion?. anyway, thanks for the info.<br /><br />Suzuki40

 

[walleyehed]

Re: plug gap?

QL86C is ALOT hotter than the QL77JC4, which has been replaced by the QL82C (hotter than the QL77JC4).

 

[suzuki40]

Re: plug gap?

Thanks for all the quick and informative info fellas. One last one before I close this out.<br />When I removed the plugs for the first time in a couple of years,The bottom cylinder was clean and a dry with a slight tan color to it. The upper plug was removed, It was wet and oily? not real bad but alot differant than the other?<br />Anything to worry about or check out?<br /><br />Last post on this subject I promise<br />Thanks,<br />Suziki40

 

[suzuki40]

Re: plug gap?

^

 

[walleyehed]

Re: plug gap?

Both should be "slightly oily", and dark to medium tan in color.....It may be in need of a good carb job.