Looking to splash my merc 850..1975 vintage..no not an xs but still an oldie but a goodie..my manual states 27 degrees for max timing...would backing off the timing be prubent on this motor??
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Merc 850 timing
Looking to splash my merc 850..1975 vintage..no not an xs but still an oldie but a goodie..my manual states 27 degrees for max timing...would backing off the timing be prubent on this motor??
I've been running mine 25* and 93 oct with the mains up 2 sizes to success so far. Make sure you don't lug it and prop it for 58-6000 up top.
What boat are you running it on..and what prop i will start out with a 19 alum then ? What are the main sizes you are running?
Small hydrostream. I think it had 90's for jets.. can't remember off hand but recall scrounging through my jet drills for a 92. Mine is a '76 so the jetting will be different, they had different carbs.
What make prop and rpm...I would like to start with a 19 alum and find a small 20 chooper!
A bigger one... not gonna say too much about it.
What carbs do you have on your 76 85?
Stock carbs. Center bowl types. Nothing special to the motor other than enough overbore to clean it up, reeds, and a gear ratio change.
What kind of speeds are you running?
It goes alright.
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