87 242SS w 454 Mag/Alpha 1 ignition timing
 

Hello, i bought this boat last year, runs well....just changed the oil, fuel filter and checked the base ignition timing and it was right at the factory 8 degrees, is there any power in advancing the timing if i run premium fuel
(91 octane R+M/2) rather than the factory recommended minumum of 87 octane?

You might but it's not worth the extra $$$ for fuel.

FYI...with these marine distributors your real timing number is the total advance at ...say...3000 RPM. Check your spec...I am guessing you should be getting 30~32 deg at 3000 RPM. As you know...you need a timing light with a dial to check this.

Also FYI....If you are running a Q-Jet and have any issues with it I suggest Cliff Ruggles at Cliff's High Performance (google for url). He is an expert on Q-Jets and sells a MARINE Q-Jet re-build kit that is complete including a new float that is ethanol compatible. Give him your Carb No and he will customize a kit for you.