Briggs and Stratton Vanguard V Twin

[Stubby]

12 minutes ago, woody paul said:

The spark plug is a service item and should be changed after so many hours. 

Yep . True . but what has caused the right hand plug to blacken and carbon up . Oil getting by the rings on that cylinder may be ?

[eggsarascal]

43 minutes ago, Stubby said:

Yep . True . but what has caused the right hand plug to blacken and carbon up . Oil getting by the rings on that cylinder may be ?

I would like think if oil is getting by the rings the plug would be oily?

[Stubby]

9 minutes ago, eggsarascal said:

I would like think if oil is getting by the rings the plug would be oily?

Just trying to figure why its only one cylinder . Its a single carb I presume ?

[eggsarascal]

Just now, Stubby said:

Just trying to figure why its only one cylinder . Its a single carb I presume ?

That's what's thrown me. Yep, single carb. Oil changed every 50 hours, plugs, oil and filter every 100 hours, both roughly.

[Sawchip]

Few other posable things on top of a bad plug giving poor combustion causing the carbon in 1 of the 2 cylinders with a shared carb twin.

Valve guides ...

Sump breather....

Ignition module...

 

 

Edited April 23, 2019 by Sawchip

[Khriss]

Piston ring stuck in groove of piston ?  Just sorted one on a Husqy 335. K

[eggsarascal]

I'll  go with Dan's idea, run it for a while and check new plugs.

[Ferguson system]

How was the gap on the old sparkplugs?

[PeteB]

Just a thought. What is it on? Some grinders always work with the engine tipped frontwards. While within the capabilities of the oil pump, it may have an effect?

[eggsarascal]

7 minutes ago, PeteB said:

Just a thought. What is it on? Some grinders always work with the engine tipped frontwards. While within the capabilities of the oil pump, it may have an effect?

Different trade, Pete. It's on my Drain jetting machine.