MrKulio
New Member
- Aug 22, 2020
- 15
- Boat Info
- 2005 Sea Ray Sundancer 300DA
- Engines
- twin Mercruiser 5.0 MPI
I overhauled/repowered my 2005 300DA over the winter. 2 brand new 350 MAG MPI's, 2 new transom assemblies, rebuilt upper units and the lower units are 2yrs old. Running Bravo 3's 2.2 with 22P props.
Just broke them in at 20hrs last week, changed the oil, checked all the fluids, and finally had a chance to open them up! Starboard is lacking power after 2400 RPM but will eventually climb once on plane. Port is running like a champ and will continue to climb to 4800 RPM with very little hesitation.
I've been working with the company where I purchased the engines and here is what I've done so far.
A few things I've noticed
Thank you!
Just broke them in at 20hrs last week, changed the oil, checked all the fluids, and finally had a chance to open them up! Starboard is lacking power after 2400 RPM but will eventually climb once on plane. Port is running like a champ and will continue to climb to 4800 RPM with very little hesitation.
I've been working with the company where I purchased the engines and here is what I've done so far.
- Replaced in-line fuel filter
- Replaced water separator
- Replaced all 8 spark plugs
- Replaced cap and rotor
- Replaced wires
- checked the siphon valve (opens and closes with 12v ignition)
- Fuel pressure stays consistent at 39 RPM's under load
- Pulled the boat out and checked for damaged props and debris
- Trim tabs and Drive Trim are working as intended
- Throttle and shift cables are 2yrs old
- Verified throttle position reading matches controls
A few things I've noticed
- the spark advance on Starboard never goes above 26 degrees
- I've seen Port jump to 32 degrees
Thank you!