Hi Peter, I have a 2006 Playtime 500 plus Yamaha 80 & on its first service last week the engineer advised me to get a new primer bulb. Seemed ok to me but I did have to give it a squeeze or 3 to get going, I thought this was the norm. I will email Ribeye as it seems a bad batch was fitted.
Anyway, I just bought one - only 7e & 2 mins to fit. Failing that it could be a dirty fuel filter, this was replaced too & cost 40e. Apart from these 2 bits & perhaps a snagged fuel line (have a look at the closed section behind the transom by removing seat backs & panel) then there isn´t much else to do.
I am keeping the old primer as a spare for my aux tank (bought some more fuel line so I can attach up the aux tank in case I run low or have a main tank feed problem).
Hope it helps, anything else just email or post here.
Good luck with the sale.