Recent content by Mauro Palma

The left temp sensor was replaced by the previous owner with incorrect one

The gauges are off they are not running that hot

Thanks getting there.

UPDATE: I replaced both Ignition modules and ignition pick up coils and reset timing. Max rpm now 3,000 and boat does get on plane and tops out at 30 mph. It is much better but it should get to 4200-4600 for sure.

That sounds like the next best thing, but from the spin on filter to the back of the fuel pump there is one line and from the fuel cooler to the fuel rail there is another line. line. I am thinking that at least bypass all the fuel lines and go directly to the inlet side of the fuel pump. Do you...

Yes. If you look at the stuff we had done. The prop shop reconditioned props and it came with a sheet which has the numbers after the reconditioning. I verified it against the OEM props in the parts manual

The rev limit at 3100 rpm is in neutral at the dock, that is normal. When under load at wide open throttle the rpms do not make it past 2400 on each engine. These are L29 MPI engines

For sure something stupid. I have at least 26 years with General Motors dealerships and this is the first time something has kicked my butt that I have not been able to figure out in a short period of time.

Funny and so true. I have spent many hours and numerous days on this problem and have just about almost exhausted everything but have never given up

I will, I had a mercruiser tech with me because he had the scan tool to to set base timing. At that time we did confirm firing order and timing advance

From the list I installed new cap rotor and wires. The distributors we installed at top dead center and the firing confirmed and correct The engine were built by a reputable engine builder and they only have 100 hours on them. Thai boat was purchased not running so we do not know it’s prior...