Boat Motor Issues

Hello....I`m contacting You for My Buddy-Charles Maciejewski " Ma Chi

Yeski " ( 989-389-3565 ). He has a SUN TRACKER Pontoon Boat.

It has a Mercury 4 Stroke Motor, & He has had it in for Numerous Repairs

regarding the Carburetor. He was told by Mercury Marine that it is the

GAS. Every time it goes in for Repair, they tell him it`s the GAS !!

There are people that use the same GAS as He does, & they don`t have a

Problem....Is there someone He can Personally Talk to regarding this

Issue ? He stated that the Motor is under warranty, but that Excludes

the Carburetor. What can he do to file a Complaint ? Thank You Very Much

for Your Time. Dave