+1 on 28-30 degree BTDC for your timing. I think the gentlemen that is stating 40 + degrees are taking their measurements different than most of us. Setting your true timing at 40+ degrees would make a very hard starting if not impossible engine to start. I like to use a 1/2" - 3/4" nap paint roller for a chicken stick. Doesn't damage the prop and I even use one to start my 220 Mintor and my 250 Moki with no issues. I hope this helps...

p.s. be careful with every thing you read on the web