That engine was built on 3 April 1992, and is a third design generation engine, with the automatic choke on the PulsaJet. It should be a nice engine.

As I understand it the only engines fitted with the second (idle) governor spring are the ones with "governed idle". The later governed idle engines did not have an idle speed screw, and I think all of them had a special bracket to serve as the anchor for the idle spring, so your engine does not seem to be a governed idle engine and hence should not have the second spring. (Having said that, there's no telling what configurations might have been built in the factory whilst using up the last of the parts for the non-governed-idle engines.) The idle speed of governed idle engines is adjusted by bending the bracket on which the static end of the idle spring is mounted, as shown in the B&S manual:
[Linked Image]

So, you can remove the idle spring and set the idle speed with the idle speed screw, or if you wish you can find or make a governed idle spring anchor bracket, so you could have the choice. Idle speed on most of those engines should be 1,750 rpm. Maximum speed is 3,000 rpm on the vertical crankshaft engines.

I notice the adjustable idle stop on your engine is screwed all the way in, which would result in a very high idle speed even without the governed idle feature.

Last edited by grumpy; 24/08/12 08:47 AM. Reason: Add information