S
SR75
Guest
"Ok, need some help here from
"Ok, need some help here from you experts!
2006 5.7 EFI running hotter than normal at higher RPM. Bravo 3 drive. Always runs 170, lately at 2500rpm and up, running 200-210.
I just replaced the thermostat. Took boat out on run, same symptoms. Fine at lower RPM, heats up quickly at 2500 rpm on up.
I then changed the impeller. Ran boat, same symptoms again.
I then took off all the hoses (at different times), started engine and checked flow. I have more than adequate flow from every hose. Even flushed them with fresh water from garden hose and got adequate back flow outside the boat. No visible obstructions or clogs anywhere. Boat is in the water so makes it easy to perform these tests.
Now...... at higher RPMs, the starboard riser is hot, and I mean HOT!, the port riser is normal temperature, warm but not even close to the starboard temp, I can't even hold my hand on the starboard riser for more than 4 secs.
NOW WHAT?? Help!
What else should I be checking and/or replacing?
Thanks!!"
"Ok, need some help here from you experts!
2006 5.7 EFI running hotter than normal at higher RPM. Bravo 3 drive. Always runs 170, lately at 2500rpm and up, running 200-210.
I just replaced the thermostat. Took boat out on run, same symptoms. Fine at lower RPM, heats up quickly at 2500 rpm on up.
I then changed the impeller. Ran boat, same symptoms again.
I then took off all the hoses (at different times), started engine and checked flow. I have more than adequate flow from every hose. Even flushed them with fresh water from garden hose and got adequate back flow outside the boat. No visible obstructions or clogs anywhere. Boat is in the water so makes it easy to perform these tests.
Now...... at higher RPMs, the starboard riser is hot, and I mean HOT!, the port riser is normal temperature, warm but not even close to the starboard temp, I can't even hold my hand on the starboard riser for more than 4 secs.
NOW WHAT?? Help!
What else should I be checking and/or replacing?
Thanks!!"