spark plugs???

[fishio]

i have a 1976 135hp evinrude motor,when i bought the boat it has autolite plugs 2634 and it runs fair with them,but my question is my book shows ul77v champion plugs with no cross reference to the autolite 2634 so which plug should i use??? my book shows the cross reference should be autolite 2892? thanks for any help

 

[mmccoy555]

Re: spark plugs???

I would use what the book tells you. The autolites (which are crap plugs in my opinion) may not even be the right ones unless you can find out what the cross reference is.

 

[Burrich]

Re: spark plugs???

Their website says 2852. I've heard of people recommending NGK. I was working on my carbs this weekend and a old timer mechanic says he only runs platinum bosch plugs in his boat.

 

[mmccoy555]

Re: spark plugs???

Personally I like the NGK too. Just an all around good plug.

 

[mmccoy555]

Re: spark plugs???

A plug is a plug as far as I see it. The only reason manufacturers use certain plugs is because that's who they have a contract with. Very rarely will you see a plug that only works good in certain engines.

 

[fishio]

Re: spark plugs???

thanks so much guys for the quick reply and the help;i do believe i am going to go with the ngk plug buhxw-1 and try it out later....

 

[Benny1963]

Re: spark plugs???

champion ql77jc4 gapped at 030 is the crossover for ul77v trust me they work the best in the old rudes stay away from ngk or autolite

 

[kenmyfam]

Re: spark plugs???

Champions are recommended and I would use nothing else. Made a mistake over 30 years ago by using the "equivalent" NGK's in a motorcycle. Found it was a bad mistake !!

 

[MikDee]

Re: spark plugs???

Those are surface gap plugs, I totally agree, Champions work best!

 

[tx1961whaler]

Re: spark plugs???

A plug is a plug as far as I see it. The only reason manufacturers use certain plugs is because that's who they have a contract with. Very rarely will you see a plug that only works good in certain engines.

Not true at all.

 

[fishio]

Re: spark plugs???

thanks guys you seem to know your stuff...well i did go with the champion ul77v plug before all of you replied..i ran into a problem..i changed plug cylinder #1-3 with the champions and they were wet with a little oil..but the #4 cylinder was dry it looked like a brand new plug!!! what causes this??the autolite 2634 plugs i took out had been in the motor for some time i tried switching the autolites back in the motor and ran the same as the champion plugs.. i took the boat out it was a little hard to start but run good when it took off;but dont have the power it should...my pontoon boat is in a slip on the lake and i have no trailor and not alot of money i would be so thankful for any help from you guys..and if all else fails is it ok to run the motor on 3 cylinders??? sorry im such a noob..thank you for your time and knowledge

 

[crxess]

Re: spark plugs???

Don't run the boat with one cylinder down. If getting no fuel it will burn something out. Bearings/rings

Pull and clean the carbs and try again.

 

[fishio]

Re: spark plugs???

ok ty crxess..i have a carb. kit coming in and a manual;i have never cleaned a carb. of any kind so i am a really big noob but im willing to get my hands dirty;i suppose it is pretty plain and simple..any specific thing i should know?? thanks so much;ill keep ya posted

 

[Boss Hawg]

Re: spark plugs???

ok ty crxess..i have a carb. kit coming in and a manual;i have never cleaned a carb. of any kind so i am a really big noob but im willing to get my hands dirty;i suppose it is pretty plain and simple..any specific thing i should know?? thanks so much;ill keep ya posted

I just changed from NGK to champion ql77jc4 & love them
For as the carbs just get the correct kits & be carefull to put them back exactly as you took them off & apart - One of those "If i can do it things"

 

[fishio]

Re: spark plugs???

k thanks for advice,it is going to be tough trying to do this with my boat on the water it is hard to get to the motor,so wish me luck lol

 

[fishio]

Re: spark plugs???

well i got my manual in and i stand corrected(told you i am a noob) but in my post i said it was my #4 cylinder that wasnt getting the fuel but in fact it is my #3 cylinder not getting fuel.....so do you think it is still a carb problem and if so which carb{ top or bottom} feeds fuel to the #1 and #3 cylinders i only got 1 carb kit and was going to try to clean 1 of the carbs im trying to read up in my manual but it will take some time ,what do you guys think?

 

[ezeke]

Re: spark plugs???

Each carburetor has two throats and two sets of high speed jets plus two sets of idle jets. Each side of the carburetor serves one cylinder.

The carburetor kit services one carburetor, so you need two kits to do both carburetors.

Cylinders three and four are both served by the lower carburetor.

The current BRP listing for the spark plug is the Champion L77V surface gap. The listed plug for sustained slow speed operation is L77J.

 

[fishio]

Re: spark plugs???

ok ty so much for the info...

 

[fishio]

Re: spark plugs???

well guys,i took the bottom carb. off and soaked it and cleaned it out;it didnt look dirty at all but i took it apart and cleaned it anyway i didnt see any smudge no dirt of any kind in the bowl or anywhere and after i soaked it i took air nozzle and could blow through every jet or passage could see through some and all it looked perfect but anyway i placed it back on the boat and it is doing the very same thing there is no oil on the plug it did smell like gas a little though just dont know what to do now any clue guys?

 

[ezeke]

Re: spark plugs???

When a spark plug continues to look new, either that cylinder is not pulling fuel, not firing, or water is entering the cylinder and steam cleaning the plug.

Inspect your reeds, do a spark test and check compression.