All:
I have a 1989 Mercruiser 454 big block in a 34 SeaRay.
This season, I have been having issues with the port engine. While running at idle it sounds great / no issues with it knocking out or acting up when you shift; it fires right off as well when you hit the key.
However, when you accelerate to 1300 - 1400 RPM, the engine will run fine and then intermittently act up (acts like it looses power); I loose roughly 50 - 60RPM for say, 6 seconds and then it goes back to normal for 5 - 10min before acting up again. If I pull the throttle down, everything goes back to normal with no issues...
Additionally, the engine does not want to open up without loosing power as mentioned above.
So far, I have replaced all wires, distributor cap / rotor (plugs are next weekend) as well as the ignition coil.
Any thoughts or input would be appreciated.
I have a 1989 Mercruiser 454 big block in a 34 SeaRay.
This season, I have been having issues with the port engine. While running at idle it sounds great / no issues with it knocking out or acting up when you shift; it fires right off as well when you hit the key.
However, when you accelerate to 1300 - 1400 RPM, the engine will run fine and then intermittently act up (acts like it looses power); I loose roughly 50 - 60RPM for say, 6 seconds and then it goes back to normal for 5 - 10min before acting up again. If I pull the throttle down, everything goes back to normal with no issues...
Additionally, the engine does not want to open up without loosing power as mentioned above.
So far, I have replaced all wires, distributor cap / rotor (plugs are next weekend) as well as the ignition coil.
Any thoughts or input would be appreciated.