Steve Diomin
Contributing Member
I have a 1998 Crownline 202br with a 5.0l Mercruiser 305 with thunderbolt 5 ignition with 250hrs on it. It seems to be running a bit rich as you can smelll the fuel burning and it also leaves some black soot on the transom.
I realize that some of this is normal however I think my boat may be running a bit too rich and was hoping to make some adjustments.
When starting cold it used to fire right up, but when starting warm it would crank maybe 10 times then fire up. THis has actually changed this year a bit as it seems to take a while to start cold now also. It seems as the engine is somewhat always flooded. When I start it I dont pump the throttle or anything I just turn the key. Once started the engine runs fine, its just starting and the richness while running i'm concerned about.
I had a guy that knows what hes doing look at it last year for something else, and when we had the spark plugs out I remember him comenting on how much fuel was shooting out of the spark plug holes.....Is this normal??...or does the carb need adjusting??
This past weekend I took the spark plugs out and 6 of them were very sooty and wet. 2 of them were taned/brownish and dry I changed them all and also put on a new distributor cap and rotor. Before I start it back up I was wondering for some further advise on anything further to do or any adjustments I should or could do to the carb.
Thanks
I realize that some of this is normal however I think my boat may be running a bit too rich and was hoping to make some adjustments.
When starting cold it used to fire right up, but when starting warm it would crank maybe 10 times then fire up. THis has actually changed this year a bit as it seems to take a while to start cold now also. It seems as the engine is somewhat always flooded. When I start it I dont pump the throttle or anything I just turn the key. Once started the engine runs fine, its just starting and the richness while running i'm concerned about.
I had a guy that knows what hes doing look at it last year for something else, and when we had the spark plugs out I remember him comenting on how much fuel was shooting out of the spark plug holes.....Is this normal??...or does the carb need adjusting??
This past weekend I took the spark plugs out and 6 of them were very sooty and wet. 2 of them were taned/brownish and dry I changed them all and also put on a new distributor cap and rotor. Before I start it back up I was wondering for some further advise on anything further to do or any adjustments I should or could do to the carb.
Thanks