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1988 Mariner 150 hp mag II

B

bob coan

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" Well here I am again,the fir

" Well here I am again,the first time I posted a message everyone was very helpful.So any way in a nutshell---the motor driveshaft broke on this motor (l-4) was replaced with a v-6 lower unit from a merc.and a 23 pitch prop. Now the speedometer doesn't work. Are these units not compatible, is there a cable like a car, electric or what I looked at a exploded view but couldn't find anything there. "
 
" depending on what year lower

" depending on what year lower unit you installed, the speedo pickup is a small hole in front of the leading edge of the gearcase. It gets plugged up all the time. Take a small drill bit and poke it threw until it bottoms out. Also there is a hose that comes out at the top front of the gearcase that must be connected. If you find the hole is clogged, unclog it and disconnect the hose from the coupler and blow air threw it. "
 
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