I have owned a Mag 1.08 for several years and it hasn't missed a beat. I did find it likes to be lugged down with larger props and did nothing when I tried to rev it up and put the smaller ones on it. My best props have been a 15-8 or a 16-6.

Since you have 4 gallons through it, I would check all the gaskets. They may be getting old and hard. The O-ring under the carb is a good place to start. When you replace it, rub a little high temp silicone gasket material on the base of the carb. I use the Permatex brand from Auto Zone.

By the way, I am using the front needle valve, not the remote.