Start it right side up using your normal procedure.

My preferred engine currently is the ST .51.   I Use the same method of priming the engine which is about 4 turns - then connect the battery and slowly pull the prop thru.   I will usually get the bump on the 2nd turn and it's a one flip start after that.

     Hi Fred:

     I got out Tuesday and twice last week! I usually fly twice a week and you? Lol  I am planning to get out tomorrow.  See you at the field.

                                                                                                        Be well,

                                                                                                         Frank

Frank
  You need to get out to the field and fly not sit around BS-ing
  Also those old iron and steel engines should be put on EBay
  use the newer ABC versions they start much easier
                                                                    Fred Q

I tried to tell him that, Fred. He just won't give up that old OS Max H40   

     Hi Paul, Bill, Fred et. al.:

     I already have a couple of electric starters, battery, and charger so that part is well covered. Old age has caught up with my fingers and hand flipping leaves a lasting impression! Lol

     The engines that I am planning to use are the O.S. .35S, O.S. .40S and a Fox .40 Stunt circa 1971. The old O.S. .40 Stunt circa late 60's is the one that has .40 with a S under it.  This engine is equipped with a single ball bearing in the rear and a single ring.  I think that it was tuned for stunt use. I have at least two of these engines and they are great running engines!  One is in the Nobler that I got from Fred. They both are like new so why not use them?  I also have a LA .40 and the older LA? FP ? with the extra boost port mounted in other airplanes.  Yes, they are easy starting and they run very well.  I think that there is only about 500  rpms gained by the newer .40 O.S. engines.  Not enough to make me change!

    Fred, how about meeting at the field tomorrow at 1100 or 11:00 a.m. for some round and round? There are people flying as I type this at noon Friday.

    The muffler issue appeared in my crystal ball last week. I think that it is just a matter of time before we have a noise problem at our field!

                                                                                                        Be well my friends,

                                                                                                        Frank

     Hi All:

     My engine starting fears were unfounded as both  OS .35 engines started very easily with mufflers attached.  One was a first flip starter and the other became cranky as the day wore on and an electric starter was used.

      Thanks for the tips.

                                                                                                    Frank McCune