Cessna 150/152. Before you fly it, check the operation of the Fuel on/off valve in the cockpit. Some jam solid and can't be moved without risk breaking the shank. You must be able to turn the fuel valve off in event of a fire or forced landing. The aircraft is un-airworthy if fuel valve jams. Secondly, check the ease of use of the primer plunger. Some bind and are difficult to move. You might need to use the primer to prime the fuel lines before re-starting, if the propeller stops during closed throttle operation in the air such as stall recovery practice. Check correct operation of the park brake. They are often inoperative due lack of proper maintenance or lack of pilot reporting in the MR. .
Finally ensure you know the min static RPM range at full throttle. This should be in the AFM and generally 2280 to 2380 (C152). Some aircraft have a cruise prop fitted and have a different minimum static RPM figure. Correct min static RPM check should ensure the engine is delivering the advertised power during take off. RPM gauges have known to be faulty and the min static RPM check might show this up.