G'day. I'm with Hobbsy. I have a 56 in an old Kadet Senior and I use it to teach people to fly. Sometimes it sits for a few weeks between outings and the first start can sometimes be a bit difficult. As Dave said, they need to be "wet" and some times the "finger on the exhaust" trick does not quite get the amount of prime needed in there.

The other problem can be fuel residue partially blocking the carby. If I have had the engine sitting for a while, I use an old squash bottle to blast a little fuel through the carby. This primes the engine and cleans out any muck unless you really do have a real blockage in which case it is worth removing the needle and blowing fuel through the spray bar from both directions.

Once they are wet, the smaller Saitos are easy to hand start. Unless, of course, you manage to drown them. And that is another story.

Another trick that works well for an engine that just won't start because it is too dry is to turn it over with an electric starter and very briefly block the exhaust with your hand (but not if it is HOT). This really blasts fuel through the carby and usually results in an instant start. The "very brief" is only a fraction of a second. Too much and you can easily drown the engine and do damage so go easily with this one.