Ok, totally confused here. One page says use 91 minimum octane fuel;
Mercury Marine
Another page says 87 minimum octane fuel:
Outboard Fuel & Fuel Systems FAQs | Storage & Maintenance Outboards FAQs | Mercury Marine
Which is it????
Mercury Marine
Another page says 87 minimum octane fuel:
Outboard Fuel & Fuel Systems FAQs | Storage & Maintenance Outboards FAQs | Mercury Marine
Which is it????