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We started to winterize my 95 Merc Mariner 115 HP yesterday. All was well until it was time to start the motor. No spark. I haven't had any start up problems all year that is until the last run 2 weeks ago. She usually fires up on a second or maybe third crank. However 2 weeks ago it took at least 6 tries before she fired. Yesterday nothing. Plenty of fuel. Put the spark tester on her and have nothing. ( cheap tester is suspect). The only thing out of the ordinary was that we found 1 bolt of 2 missing from the top of the powerpac. I thought it may have worked it's way out somehow, unlikely, but the bolt isn't at the bottom of the engine. Featherstone Ted looked in his Merc manual last night and we are going to work from the fuse panel back this afternoon after I pick up a proper spark tester. The 7.99 indicated from CTC is suspect, put it on the truck and sometimes it shows spark, sometimes not. Any suggestions? Hopefully by the time I check here she's done. Any help is greatly appreciated. Johnny D