Post
by repspec » Sat Dec 08, 2018 6:39 am
Back to the fuel rating...
Stick to 95 octane...
98 has many detergents, which can work against the oils in 2 strokes...
An example of "Poorer quality fuels" (both had been buying 91 united, non ethanol)
We had 2 customers over the space of 2 years. Both bought United fuel (from 2 different servos) and used the boat. Didnt use their boats for 6 months (both keep very good records of fishing)
1 boat was a 60 Mercury 2 stroke, wouldnt run. We stripped carbies...needles stuck and green gunge in the carby bowls. Cleaned out...good as gold.
The other was a boat with twin 60 efi Mec 4 strokes. Both motors wouldnt run/ran out of fuel. Traced to VST (big carby bowl for efi system) Both had stuck needles in them.
Lucky it was an easy fix, but still costly.
The amount of issues we see daily with fuel is growing. Fuel older than 3-6 months we start to see issues. We purchased a sonic cleaner to make cleaning fuel components easier.
Ethanol fuel in cars is ok...their systems (tanks, lines, fittings) can handle it. Marine systems cant. Fuel tanks arent designed for it, fuel senders, fuel lines, primer bulbs etc. They all break down and ive seen it so many times.
Primer bulbs that you can peel apart, the rubber on the inside just breaks away.
Stick to known brands, use 91-95 octane. Anything else...your gonna have a bad day.