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Merc 800 1972 stalls under load

newb197

Contributing Member
"Hello everyone,
When I put


"Hello everyone,
When I put it in fwd gear it runs/spins fine when on ear-muffs at home. As soon as it touchs the lake it stalls out almost immediately when put into gear, although starts right back up & idles/up seemingly fine. Lower unit is in questionable condition(i.e. milky gear oil,bad seals, etc..) but like I said does spin satisfactory on the muffs.
I am somewhat knowledgable of these particular older merc outboards but by no means a marine mechanic. Anyone have any suggestions I can try? I'm all ears..
Thanking you in advance. -JM"
 
"compression, spark test all c

"compression, spark test all cyls, once you know the engine is healthy remove and clean both carbs. Sounds like one of them is clogged."
 
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