I as a matter of course pull the prop through 4 blades before starting.
It enables me to check compressions before starting.
PaulSS wrote:And, of course, unless you checked the oil level after shutting down on the previous flight, you'll have to 'pull through' your Rotax quite a few times to 'burp' the engine and get the oil into the can so the quantity can be checked.
Flying_john wrote:It is not a recommendation by Lycoming to pull through before starting as it scrapes away any remaining oil film on bearing surfaces and inside of cylinders before oil pump is able to re-supply oil.
4. COLD WEATHER STARTING. During extreme cold weather, it may be necessary to preheat the engine and oil before starting.