Engine is a 1986 140hp Mercruiser I/O. Had a no start issue on Sunday. After checking gas and spark it was apparent that the carb wasn't gettting fuel from the supply line. Put in a new fuel pump early 2010 so I was pretty sure that wasn't the problem.
Turns out there was an aluminum check valve on the tank supply line that had failed after 25yrs. I guess it was sticking from wear. I know because I replaced it with a regular 1/4in NPT - 3/8" OD barb with no check valve it worked just fine.
My question is: Will negating the check valve effect the engine in any way? I assume it is there to prevent fuel flow back to the tank from supply line and a hard start but I had it out for 4 hours on Monday and it ran fine. Re-started a bunch with no issues. Fired up immediately. Was this check valve a nice to have or is this a necessity I should be looking to replace?? Seems to me it was just something else there waiting to fail.
Turns out there was an aluminum check valve on the tank supply line that had failed after 25yrs. I guess it was sticking from wear. I know because I replaced it with a regular 1/4in NPT - 3/8" OD barb with no check valve it worked just fine.
My question is: Will negating the check valve effect the engine in any way? I assume it is there to prevent fuel flow back to the tank from supply line and a hard start but I had it out for 4 hours on Monday and it ran fine. Re-started a bunch with no issues. Fired up immediately. Was this check valve a nice to have or is this a necessity I should be looking to replace?? Seems to me it was just something else there waiting to fail.
