Blower doesnt have full power sounds like its got a govner or hitting a rev limit?

Here's some sites...

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Hello. It seems your Buick's engine is 'flooded' with gas in one or more cylinders. This will cause the engine to 'race' because of a fire in one or more cylinders. The engine gets to high rpm and stays there; this is not good! Good luck and keep me informed; if you want to.

See if you can get one of those shops to "reflash" the prom in your ECM.

Have you checked Fuel Pressure with a gauge?

Is the Exhaust Converter on there for 17 years & blocked?

Gas Filter clogged?

Does it have a timing belt that could have jumped some teeth?

If you have injectors for each cylinder,have you mailed them
off to be utrasonic cleaned?

There is not an actual rev limiter. The top end is controlled by the carb. You actually want it to sound a bit rich at full throttle so that it has enough fuel when cutting under a load. What causes me some alarm is the revving up part. If it revs too fast that is a lean condition and can quickly ruin the piston and cylinder much like running straight gas. A torn intake boot can cause this. The high speed spec for the TS400 is 9,600 rpm + OR - 500 RPM. Your saw may not have a needle to adjust the high side as some have only the low speed adjuster. Also when you disassemble and clean the carb always use a new kit with the gaskets and diaphragm. Any Stihl dealer can furnish the kits and they aren't terribly expensive. Often between $10-20.

@jgamble112, sinse it is a specific rpm, 2500, which is where the rev limiter is usually set to stop the engine when reving up, it sounds like the engine control module, or computer as it is commonly called, this is what controls the rev limitermine had smae problem, same rpm, and in gear too, its only supposed to work when in nuetral, but sometimes the computer doesnt recognize the vehicle has been shifted, hope this helps

If it's hitting the rev limiter before the red-line you need to have the ECU recalibrated or install a power commander.

You need to set the valves.

assuming is a bad thing. sounds to me like a clogged carb. also inspect the hoses that drain to ground