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Mercury 98 hp thunderbolt ingnition

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wadeallen

New member
"I wanted to find out the year

"I wanted to find out the year of my motor. It is a Mercury 9.8 Thunderbolt ignition and my serial number is 3614690. Also, I need to know how to change my lower unit oil, but can't find a vent or fill screws. Thanks."
 
"ps, remove both screws, fill

"ps, remove both screws, fill from the bottom, install top screw, remove fill tube, install bottom screw"
 
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