Crusader 6.0l, bogging down

[classic hooker]

I have a 99 Carolina Classic 28, stern drive with twin 6L, One engine seems to start bogging down after about 5-7 miles of runing at cursing speed. Come to a stop, start moving again, its fine for about the same ammount of time. It did this 3 or 4 times yesturday, the last time i propped the engine hatch open, it made it about 12 miles 4k + rpm's no issues. I dont know is it was related to having hatch open a bit or not. Has any one ran into this problem ? The primary feul/water seperator and secondary filters just had this run on them.

 

[fastjeff]

Might be fuel starvation for (??) reason. Better test for fuel pressure at cruising speed before you hole a piston.

How is this done? If your motors are injected (not sure) there's a fitting in the fuel log to test the pressure. (Auto Zone will let you borrow a test kit.) If yours has a crab, then all you need is a skilled helper to put some choke on (with the linkage) when this sagging action happens. If the motor picks up, it's fuel starvation; if it slows further then it's something else.

Jeff

 

[makomark]

2X on the fuel pressure check...I've never seen a 6.0 marine engine that wasn't injected so Jeff's choke trick isn't likely to help...

Could be crud in the tank covering the screen, anti-syphon valve, or even a fuel pump issue...you will have to do some diagnosing to find the cause of the issue