Update....and would like some serious input here on where to go next with this..
Attached remote fuel tank straight to engine on stbd side, took it out and port eng ran erratic as before, and stbd stayed steady, even up to about 4000, until it ran quickly out of gas (5 gal). So, looked very positive towards fuel line prob. Consistently, for several runs now, it has worked great for a little while, then degraded to barely idling, within about 10 min. So, thought was, fuel lines were collapsing under pressure, especially with new fuel pumps, and they did feel soft and flattened in places.
So after $300.00, and several hours of running new supply lines to each motor, and connecting up, took out for test. Both sides ran great, which was an improvement from last test, right up to about 4200/side, steady, all for about 10 minutes... Then, right back down to rough running, and low, erratic rpms.
Very frustrating... thoughts??
Attached remote fuel tank straight to engine on stbd side, took it out and port eng ran erratic as before, and stbd stayed steady, even up to about 4000, until it ran quickly out of gas (5 gal). So, looked very positive towards fuel line prob. Consistently, for several runs now, it has worked great for a little while, then degraded to barely idling, within about 10 min. So, thought was, fuel lines were collapsing under pressure, especially with new fuel pumps, and they did feel soft and flattened in places.
So after $300.00, and several hours of running new supply lines to each motor, and connecting up, took out for test. Both sides ran great, which was an improvement from last test, right up to about 4200/side, steady, all for about 10 minutes... Then, right back down to rough running, and low, erratic rpms.
Very frustrating... thoughts??