Sounds like a choke or carburetor problem?

Jeff


"lybarra" wrote in message
...
I have a 1970 Mercury 800 80hp outboard motor I've been working on. It
starts great but once warmed up, it has a rough idle and I can't seem to
bring the idle down. We did everything the service manual said and can't
get the idle right. We set the timing, check the fuel fitlers, adjusted
all
the screws. Does anyone have a clue what we are doing wrong?

Thanks