I have an old Bolens snowblower Model no. 625 serial no.02002544. that I have some questions about. 1. Where can I find a manual for it, 2. Where is the Engine no. on this tecumseh engine, it looks to be about a 5 or 6 hp., 3. How do I adjust the carb., it has two adjustment screws, one in the bottom of the bowl and horizontaly on the left side of carb ( looking at the choke plate.

 

The "625" means 6 hp, 25" cut. The engine number should be under the electric start button, on the fan on top of the engine. This is a fairly old machine, so the numbers will be hard to read.
Carb adjustments start at 1-1/2 turns out from lightly seated on both. The bottom screw is high speed. The side screw is low speed. Low speed affects idle to 1/4 throttle. High speed affects above 1/4 throttle.
You may be able to find a manual on Ebay.

 

Just found this on Ebay.
BOLENS SNOW BLOWER MODELS 524 THRU 1032 SERVICE MANUAL - eBay (item 370312324535 end time Jan-26-10 19:14:35 PST)

It is listed as a "Buy-It-Now" only auction, so act quickly before some one else buys it. Seller is only in PA. so you could have it by mid week.

 

Many thanks Indipower! The Manual from ebay is on its way. The carb screw info worked great! we are up and running!