Luhrs 290 Tournament owner, boat with 1995 Marine Power 350's / 5.7 CID motors (under 1400 hours). Recently changed from Holley to Edlebrock on recommendation from marine mechanic because Holley secondaries where not opening on port engine, motor would not go above 3300 rpms.. New Edlebrock carburetor ran well for about an hour, turning 4400 rpms then experienced loss of power... Changed fuel filter but needed carb cleaner to get engine running next day. Same issue resurfacing again, loss of power/no throttle response above 3300 rpms, pushing on a string. Any thoughts appreciated. Mechanic thinks I may need to drain and polish fuel, clean out port side fuel tank or problem will continue to reoccur. Any suggestions appreciated. Starboard engine runs like a champ with Holley carb.