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1983 70HP Merc jet size

biffidum

Contributing Member
"My engine runs and starts wel

"My engine runs and starts well (could do with more top end HP. I took a look at the main jets and they are 0.072, I did a search and the 40 HP uses the same jet... Does anyone have a manual to see what the correct size jet should be. I live by the great lakes, not exactly sea level but not that high in altitude. Any help appreciated."
 
"According to the Service Manu

"According to the Service Manual you can use the .072 up to 5000 ft, .070 upto 7500 and above that .068."
 
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