Here’s where you can get the official factory Illustrated Parts Catalog, direct from Cessna:

https://www.cessna150152.com/forum/...lustrated-parts-catalogs.html#Post558223

They haven’t made the Service Manual available for free. Older copies are floating around on the interwebs, though.

-Kirk Wennerstrom
President, Cessna 150-152 Fly-In Foundation
1976 Cessna Cardinal RG N7556V
Hangar D1, Bridgeport, CT KBDR