Motor is a 2010 Mercury pro xs model #1225p73ed / serial # 1b802750 / 25 p tempest
plan on doing a fuel and air pressure test, I have a fuel pressure gauge good for 100psi
i believe air pressure is from port fuel rail and fuel pressure is from star boadd fuel rail?
Also im going to check fuel pressure at the vst and also fuel pressure at the line before pulse pump.
I believe specs were 90 psi for fuel pressure and 80 psi for air pressure?
Whats the psi for fuel inline from primer ball to pulse pump? And how do you check low pressure fuel pump?
Also do I check with the motor running or with the key on the start position?
Been reading all the previous threads so just want to verify. Also does anyone know where I can get a repair Manual for this motor or know where I can buy one?
I belive I’m having fuel pressure issues that’s why I want to test fuel pressures. Thanks in advance.
running wide open throttle at 5600-5700 rpms after 1-2 minutes engine sputters, drops to 3800-4200 and feels sluggish. No beeps or anything. Beeps when first starting (check beep). When I shut if off after acting up I turn it back on imediarely and and full throttle and I have full power again but same issue occurs, loss of power after a minute or 45 secs. Smart craft gauge (digital) shows good voltage at wide open throttle, 14.0 v. Water pressure above 20 or around 20 psi. Motor has 167 hours , serviced motor at 165 hours new impeller, lower unit fluid, spark plugs, and fuel filter. Done by an experienced boat mechanic from my knowledge.
Going to put a new primer ball and fuel line to pulse pump this weekend and check fuel pressures and air pressures. Any input would be nice.