Repowered a 2003 2359 from 5.0L to 5.7 MPI last year. Changed the Merc upper from 1.62 to 1.47 SEI. I kept the original lower. I expected whine during break in that disappeared around 20hours. Boat ran great for 60 hours. When coming in from last tuna trip the outdrive started sounding...
Just installed a new 2012 5.7 MPI Indmar with full closed cooling(heat exchanger). The engine came fully assembled ready to go including anti-freeze and oil. I have ten hours on it and am a little concerned that the engine is running too cool. It runs 145 to 150 degrees on the temp gauge...
Just installed a new 5.7 MPI indmar and am in the process of breaking it in. The temp and oil readings are different from my replaced 5.0L Carbed Merc and wanted to know if these new ranges are normal. The oil pressure is higher on the new engine and the temp is lower. I run a full closed...
Re: interrupt switch with new engine
It has a MEFI 5 ECM. Attaching the wiring diagram I was given as part of the installation instructions. I am re-using my original merc shift plate and switch(which is the source of the problem). I want to use my free day tomorrow to start breaking the...
I just replaced my 2003 5.0L Carbed Mercruiser with a 2012 5.7 MPI by Indmar, I thought I was at the finish line today but the final step was splicing the brown line off the ECM into the shift interrupt switch. But I found the interrupt switch is doing exactly opposite of what I need. It is...
Re: just got new engine now I have questions
Found the starboard side engine mount had a half inch it was not dropping because the engine was hanging up on the lip of the foot. I was able to pull it away from the engine just a bit then the engine dropped all the way it could. The alignment...
I ordered a Indmar 5.7 MPI from Michigan Motorz for an Alpha Drive. I was excited to drop it in tonight but quickly hit disappointment when I saw it lacked the rear motor mounts that bolt down to the drive housing. It also lacked a shift plate and a hose barb on the back of the engine to...
I have a 2003 trophy 2359(~24ft 6000lb) with a 5.0L Mercruiser and alpha genII that is almost exclussively used in saltwater. I have been underpowered since the day I bought the boat. The engine now has no compression on a couple cylinders so instead of putting money into repairing a 9 year...
I have a 2003 5.0L Mercruiser with alpha gen2. Two years ago I replaced the ignition sensor module in the distributor when we could not get the boat to start, which fixed that problem. My boat started misfiring/backfiring/stuttering when under load around 2-3K RPM last year. Replaced the...
I have a 2003 Trophy 2359 with a 5.0 Merc alpha gen2. Took the boat out this weekend, I started boat before lowering the outdrive(heard a strange sound, and lowered it immediately, drive was under water the whole time). Backed away from the dock in reverse successully, shifted into forward but...
