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The CH740 Kohler Command Pro was overrated for HP. They eventually changed the rating to 25hp. Do your research thoroughly before pulling the trigger on the Briggs. There are many factors to consider. Wiring can be modified, but crankshaft must be proper Diameter and length to accommodate PTO...

Jeff, a Scag Turf Tiger 2 is a ZTR zero turn radius mower, not a car, I'd refer him to a schematic of his electrical circuits for his application. Can be dwnld from Scag website.

Price is reasonable - simple search result - copy and paste in your browser << https://www.amazon.com/Castrol-06142-6PK-HD30-Motor-Quart/dp/B00B9XDM0W

I've been reading this post from the beginning, and totally agree on coil theory. I've experienced this mostly on older equipment with high hours on engine, regardless of manuf. As a rule it's a common issue, but coils are unpredictable and can fail at any time. The symptoms indicate a coil...

I see in your question mention of fuel in oil. Sounds like your pulse fuel pump is defective and allowing fuel to enter crankcase. Depending how long the pump is bad you could have considerable breakdown of oil viscosity which would cause the symptoms you've described. The pressure you observed...

Not sure what is the problem with your 740, but retrofit coil kit has no impact on compression loss. The coils just pickup a magnetic field to provide spark for ignition. Nothing related to your valve seat issue. Closely inspect the head for micro cracks. This one needs a more in depth check to...

Remove the spark plugs and with a flashlight observe if the pistons are moving back and forth. I think by what you say, your engine is a vertical shaft twin. You probably have a broken rod, or a valve has dropped into a cylinder. Possibly maybe even a crankshaft counterweight has let loose...

The laser temp reader is just that Actual temp. Do a search for normal temps for your engine, then use your expensive Mac, You might consider getting one from the Snap On truck and do a comparison for accuracy.

Try not lowering rpm's to idle B4 turning off key. Run about half throttle then turn off ignition. My Scag CH740 is the same way. Sometimes the simplest thing will resolve an issue. You're engine has hydraulic lifters and doesn't require adjustment. If you don't run at full throttle when mowing...

Visually appears to be a blown head gasket. Just turning the engine over you should detect a compression leak at the location you have marked with a circle. You could also remove the plugs and do a compression comparison between the two cylinders. The wires look like they've been melted by heat...

I got mine at Kubota, but the manufacture name was "Tuff Top". It's called Kabota orange, but the color match to Scag is acceptable. It's very sturdy, quick removable, all brackets and hardware were included. I've had it on for apx 12 years and still looks good. Very durable. I'm sure vinyl...

I bought a new Turf Tiger with 27hp Kohler Command Pro in 2006. Regular maintenance at home 4 acre lot weekly through seasons. Two years ago the engine shut down unexpectedly while mowing. Sounded like an alarm clock. The issue was that Kohler doesn't key the crank gear that that drives the...

I use the impact also for carb studs. head bolts, and valve cover bolts. I'd use it for rod bearings, but I can't find one small enough to fit in the crank case.

I've had a Turf Tiger since 2006. Never had a problem using 1/2" drive Ingersol air pressure 90 - 110 psi. Neighbor brought his over for grease and sharpening, and spindle/blade nuts were same problem you're having. I have a Scag manuf blade lock I applied and used a long 1/2" breaker bar with...