Spark Plug Opinions

[Savage3]

Makes ya wonder, is it a matter of quality control at the coil manufacturer (some coils have more or less turns then others)?

Or......is it an electrical engineering miscalculation. Problems are common enough with premature coil failures to ask these questions. Worth looking into at a minimum in my opinion.

 

[Johner]

90 hours. I've never had to add oil. Plugs look a bit rich to me. FS600V. Choke fully retracted. Runs seemingly normal. No smoke (black or blue) when running or accelerating. Thoughts?View attachment 70913

 

[Johner]

Check the valve clearance, could be the oil seal on intake valve

 

[justin@justintime]

Makes ya wonder, is it a matter of quality control at the coil manufacturer (some coils have more or less turns then others)?

Or......is it an electrical engineering miscalculation. Problems are common enough with premature coil failures to ask these questions. Worth looking into at a minimum in my opinion.

 

[justin@justintime]

True on the turns, yes bit of a quality control thing also a price bracket thing. coils are coils with a primary and a secondary other then their physical appearance they work the same with the same stuff inside them go price a coil pack for a Buick leSabre not much of a difference price wise. Im sure they could make a bullet proof coil but no ones going to pay 200 bucks for it. other then maybe me. make the switch to iridium NGK plugs youll never have to change them and less load on the packs yes I run 14 dollar spark plugs in my fs600 I dumped on a craftsman pro t8200 lawn tractor. And part up dates we dont get to see the reason why cause big names like kawai, JD Stihl keep that stuff under wraps (the oops we F'ed up on the first batch) yet I can get TSBs for the buick leSabre with a flick of the keyboard.

 

[bentrim]

Somthing to think about. A V twin engine fires the same as the two cylinder John Deere. One cylinder fires and the other fires 90* later then there is no power for 270* turn of the crankshaft. John Deere had an issue using single barrel carburetors because the first cylinder was lean and the second cylinder was rich. This was caused by the air flow thru the carburetor, the first cylinder had to "start" the mixture moving and the second got what was the over rich charge because the mixture was now up to speed. John Deere fixed this in the fifties when they started using two barrel carburetors.
If you consider the V twin if fires the same as the old Deere's. The old flat head opposed twins would fire 180* if you ever paid attention you noted the different exhaust tone.

 

[Propflux01]

AF CrewChief?

Engines.

 

[Red Good]

You spent the money to buy a Kawasaki motor , don t put anything but NGK plugs in it . jmho

 

[justin@justintime]

Somthing to think about. A V twin engine fires the same as the two cylinder John Deere. One cylinder fires and the other fires 90* later then there is no power for 270* turn of the crankshaft. John Deere had an issue using single barrel carburetors because the first cylinder was lean and the second cylinder was rich. This was caused by the air flow thru the carburetor, the first cylinder had to "start" the mixture moving and the second got what was the over rich charge because the mixture was now up to speed. John Deere fixed this in the fifties when they started using two barrel carburetors.
If you consider the V twin if fires the same as the old Deere's. The old flat head opposed twins would fire 180* if you ever paid attention you noted the different exhaust tone.

Intake manifolds are different lengths on either side of the carb to compensate for this. If you're referring to the newer Happy Homeowner JD tractors and zero turns running single barrel Breaks and scrap em engines the older ones pre 2021ish benefit big time from a larger updated part number main jet and its noticeably larger. No service bulletin from briggs just a part number update that I'm aware of. Im also B&S dealer not that I wear that as a badge by anymeans. But JD got more BS in them than the ones rocking the name with B&S

 

[outdoorpowermike]

Very possible that the spark plug that is white in color has a intake seal or gasket starting to fail. Try spraying something like 2+2 carefully around the intake manifold at cylinder head, If engine rpm changes replace gaskets or seals. Just something to consider.