I have a 90 hp 2007 yammy (inherited from my Dad) that has lost a cylinder. I've been running it that way for a while and its providing what I need but needs a tune up with spark plugs, etc to get it starting better. It does what I need once it warms up but is a problem to get started. Who do you recommend to just give a lower unit, fuel pump and spark plug tune up without the whole huge cost of a rebuild? Thanks. I appreciate it