extreme plugs

[BERNIE91]

Will extreme sport spark plugs damage (in any way) my 1976 35hp johnson sea horse ?

 

[CATransplant]

Re: extreme plugs

Will extreme sport spark plugs damage (in any way) my 1976 35hp johnson sea horse ?

What are "extreme sport spark plugs?" And why do you want to use something other than the recommended plug for that outboard? Is it running badly?

If your Johnson's ignition system is working properly, and the carburetor is working properly, and the engine has decent compression on both cylinders, the recommended spark plugs will give you the best possible service. Anything else could make it run worse, or even damage your engine.

 

[BERNIE91]

Re: extreme plugs

Champion l 82 c is the recommended plug, but the dealer was out so I bought autolite crossovers for champions. It runs the same.

 

[BERNIE91]

Re: extreme plugs

extreme plugs are supposed to be hotter . They are used in dirt bikes,jet skis, etc.

 

[CATransplant]

Re: extreme plugs

Ah, well, that information helps a lot, since it's specific. I don't see a problem with using a cross-referenced plug, but that cross-reference autolite number is recommended as a replacement for a bunch of different Champion plugs.

I'd be a little leery of it. OMC was pretty specific about the plugs they recommended for their outboards, and they were always Champions. Now, you may not have a problem with the Autolites, but I've never been in a town where you couldn't get whatever Champion number you needed. The dealer you went to may not have had them, but the parts house down the street does, I'm sure.

Cross-reference non-Champion replacements may well have a different heat range than the recommended plug. For two stroke engines, that can be critical.

I'm not saying the Autolites will ruin your engine. But the recommended plug is a Champion number.

Plugs are cheap. Outboards are expensive.

Still, one you provided specific information, rather than your generic sort of first post, things were a lot clearer.

 

[CATransplant]

Re: extreme plugs

extreme plugs are supposed to be hotter . They are used in dirt bikes,jet skis, etc.

Right. Is your outboard motor a dirt bike or jet ski? Now, by hotter, I don't think you mean heat range. Running a plug with a higher heat range in your outboard is a good way to burn a hole in a piston.

Instead, what you mean (or what Autolite means) is that the plug has a thin wire center electrode, which makes a spark a bit more easily. Hotter is a poor word to use in the spark plug world, since it generally means heat range. You don't want a "hotter" plug in your Johnson. It's not a good thing.

But, never mind. If the Autolite is equivalent in heat range to the L82C, then you'll be OK. But...is it? I don't know. All I know is that Autolite says that it's equivalent to the L82C.

I know for an absolute fact, though, that the Champion L82C is exactly equivalent to the Champion L82C. That's what's recommended for your Johnson outboard. If it were me, I'd head on down to the local parts store and get myself a pair of Champion L82C plugs. Let me see: Yes, I do have $6 in my wallet. Yup...it's Champions for me.

 

[CATransplant]

Re: extreme plugs

OK, I went to the Autolite website and looked up what plug they recommend for your 1976 Johnson 35hp outboard. Their number is 4092. It's the proper heat range for that engine. Is that what you installed?

If not, go get the Champion L82C plugs. Unless your dealer looked up the specific application information for your outboard, he may well have given you the wrong plug. If he just did a simple Champion to Autolite cross-reference, then chose the "Extreme Sport" equivalent, you may have the wrong plugs in your outboard.

Spark plugs are cheap. Outboard motors are expensive. Repairs are expensive. Why take the risk. "Hotter" plugs will not give you more horsepower. They will not make your outboard run better. They could, however, cause other problems. Why buy trouble? Put your Autolites in a box and use them as emergency spare plugs. Run L82Cs.

 

[BERNIE91]

Re: extreme plugs

Logical advice...The autolites#xs4093. I'll switch to the champions. Thanks

 

[CATransplant]

Re: extreme plugs

Happy boating!

 

[tashasdaddy]

Re: extreme plugs

if you want your motor to continue to give you great service, only use the recommended parts.

 

[going slow MacGyver]

Re: extreme plugs

Plugs like the quad 4 bosch if matched are ok it fires the fuel better with less power needed. BUT if you put a hotter plug in it can cause damage if your not dumping more fuel in. there are hotter plugs for racing to spark a lot more fuel or for older engines that burn oil. but some companies call plugs hotter because it gives a larger spark kernel not a hotter one. hotter plugs go by the numbers on the plug. if you match yours to one of the super plugs you'll be fine. if your burning oil getting past the rings or down the valves then go with a hotter plug. its good to keep a set of hotter plugs in bad weather. wet air from a storm wets your fuel to air mix and a hotter plug can save your life powering you thru a storm. also if your stuck in fog have radar and are driving hard thru the fog. if your putting normal plugs will still work well. if your taking on water use of the hotter plugs will keep you running.

P.S.
this was for everyone not just the little motor boat. I have 3 boats paid for. and have been rebuilding engines and boats ect from 1969. for your little 35 hp if you take it out in big water put hotter plugs in, your bound to suck water into your engine and you don't want loss of power in your little boat. mix a little more oil to the fuel if it clears up to keep the heat down