New outboard fitment

 Hi all. I'm going to put a new yamaha 50 four stroke on the quintrex. Just thought i'd ask if anyone has any recomendations of a business in the mandurah area to do the job. I recently had the existing yammy serviced and when i got it back it ran like shit. Turns out they had put the fuel primer bulb in backwards. I mean the thing has an arrow on it indicating the direction of flow for christs sake. Finding it hard to get anything done properly these days hence the question. Cheers guys.