I purchased a new 2015 Yamaha SX192 jet boat from ...

I purchased a new 2015 Yamaha SX192 jet boat from Fremac Marine. When discussing the initial purchase and speaking about the boats performance they recommended installing "Thrust Vectors" made by Jet Pilot. They assured me it would increase performance giving me better steering at low speeds. After purchasing and driving my new boat it had a vibration. After more than two months of wrangling with these people and, them telling me there was"nothing wrong with the boat".They finally removed the "Thrust Vectors" and the problem was solved. After spending the summer driving my new boat with an annoying vibration, I asked for a refund of the cost of the "Thrust Vectors" a mere $250.00 and they refused ! Unbelievable, particularly since I'd spent more than $30,000 with them. They couldn't see there way to giving me my money back on a product they recommended which caused the vibration in the first place! Further, the Vectors are not even approved by Yamaha. I was stunned! These people are the WORST at service after the sale I've ever experienced in more than 40 + years of boating. Spend your money elsewhere! These people care little about customer service after the sale or customer satisfaction!