Too much gas in motor

[mot007us]

I have a older 100 hp javelin 4 cylinder motor, spark plugs are covered in gas, still runs, but goes blah, blah, blah. Any ideas?

 

[Vic.S]

Your description suggests the carbs are probably flooding causing the wet plugs and " four stroking"

You dont say what year or give the model number but assuming fixed jet carbs I would be looking at the floats and/ or the needle valves.

 

[Chinewalker]

100 Javelin would be early 1980s. I'd bet your carbs are due for a rebuild, particularly if the gasket between the bowl and carb body is black. New kits have a brown or light green gasket there. Make sure the float level is set correctly, too.

Also, check compression.

 

[F_R]

Choke on?

 

[mot007us]

Thank you for the information, I am going to try to find a diagram of the motor, to get a better idea, of what you are talking about, because I am nervous about working on carbs. I found the model number and year, it is a 1979 100 hp, 4 cylinder model number 100tlr79s, also what is the best gas to put in it.

 

[Vic.S]

You will find diagarms on the official BRP parts website: http://epc.brp.com/Index.aspx?lang=E&s1=be549fef-964b-4de4-8880-34141a7c2d34

Your motor is covered by this service manual: http://boatinfo.no/lib/evinrude/manuals/1973-1991johnsonevinrude.html#/0 but an OEM manual specific for the model would be better by far.

Regular grade gasoline will be suitable ( ethanol free if possible) mixed 50:1 with a TCW3 2 stroke outboard engine oil

 

[racerone]

Post compression numbers on that crossflow.----Picked one of those up for parts a while ago , wanted the cover / cowling which was in nice condition.

 

[mot007us]

Thank you everyone for your help and the diagram and manual will really come in handy, Vic