Start Fix, engine starting product. Properties. It is used for easy and quick start of all types of 4- and 2-stroke gasoline and diesel engines and rotary-piston engines in case of starting problems due to batteries, wet plugs, cold and wet weather, etc. Application. To start gasoline engines, spray the product directly in the air filter or in the inlet manifold and start the engine immediately. To start diesel engines, disable glow plugs and heated flanges,fully open the throttle, spray the product in the inlet manifold and start the engine.