Merc 9.9 problems

[Murphytime]

My 1990 vintage 9.9 was running great until this weekend. Friday night, no problem. Saturday morning I couldn't get it past idle without stalling. I could restart it right away but it would keep stalling out. Suspecting water in the fuel,we pulled the carb partially dissassembled and blew it out with carb cleaner. The filter had a vary small amount of black slidge. We swapped fuel tanks with one we know is good. Now it it is difficult to start and stalls out in a matter of seconds. Anyone have any ideas?

 

[joed]

Re: Merc 9.9 problems

Had a similar problem with a 95 9.9. Problem was a clogged up exhaust port from using for trolling for 10 years. The exhaust was full of solid carbon chunks. Mechanic pulled power head and cleared out. About 1 hour labour and a exhaust gasket.

 

[Murphytime]

Re: Merc 9.9 problems

Thanks. I never thought of looking there. I'll try it this weekend