Whats The Best Way To Set The Timming On A 525sc?should I Do It In The Water,hooked Up To A Hose?total Advance And If So Set To What?i Have A 1998 38 Scarab That I Can Only Get 4800 Rpm Out Of It. im Running Mirage 25p With A Standard Bravo,i Believe The 25's With 525sc(supercharged,all Mercury)engines Should Get 5200 At Wot.is This right?

Your ignition timming should be checked at an idle you should have anywhere from 12 to 14 degrees and the timming total I try to run about 30 to 32 tops at 3500-3700 rpm please note that just because the engine does not come up to speed it does not say that the engine has a problem you may be proped to big in dia and you may not get the rpms if you feel you might have a problem perform a leak down test and that will give you the best indication.Good luck hope alls good Laz Mesa

Base timing at idle should be set at 13*. The 525sc has a 22* advance module. Total timing advance comes in at 4500rpms and should be 35*

Also, my harmonic balancer on my 525sc has a second mark/scratch on it from merc to measure total timing.

Thanks For The Help!im Going To Try This Over The Weekend!

I have a set of 525sc--38 total adv.

watch running it on a hose at 3500 rpms. the hose doesn't supply enough water.....and sometimes will even collapse. bring the timing light to the ramp with your 9/16.

i would always set my SC motor at full advance and let the base fall wherever it fell.