Super User the reel ess Posted August 9, 2015 Super User Posted August 9, 2015 I have a vintage 1986 Mercury Black Max 135. It's the same in the morning. It seems some direct sunlight or heat source really helps if atomize fuel. I don't use it much but when I did, I would take it over to the lake, launch, run it long enough to get it to operating temp, then dock it or beach it till the morning, when I wanted to fish. It would crank on the first turn of the key. I'm certain a little fine tuning of the carb(s) by an expert in the field would help a lot. The trick with mine when it was cold was to choke it until it fired the first time. It usually didn't catch and run then. Then I would turn off the choke and crank until running and use the fast idle a full minute or two. It was like an old carbed car. There was a combination to cranking it and anything else would usually end up flooding it. 1 Quote
Super User Catch and Grease Posted August 9, 2015 Author Super User Posted August 9, 2015 Mines a 1980 mercury 25hp and ya it definitely starts better if its hot and sunny outside and not morning time... The carb should be tuned right because we just got it back from a expert recently. 1 Quote
thomas15 Posted August 10, 2015 Posted August 10, 2015 Yeah I tried that a few hours ago at around 12, pumped the bulb, choked it, pushed the throttle up a bit and it started great with one turn of the key! Hopefully it'll start that good during the morning time as well. I hope so too my friend. I've also noticed that my Mercury doesn't care for 87 octane fuel, 89 or higher is needed. Quote
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