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ronkchar

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Posts: 38
Reply with quote  #31 
Just to reiterate this is a 2012 E75DPLINC I bought used off from ebay back in February. It had 229 hours. I have it on a Nitro 160TF bass boat.I have no idea what was in it for oil. The tank was drained for shipping. I put xd100 in it and that is what it is set for. I also replaced spark plugs indexed correctly. I put in a new thermostat. I removed VST fixed the crack in it. Cleaned it out, and replaced the small filter. I tested the water system and the fuel system for leaking both were good. I tested the pressure regulator to start opening at 15 psi. It was good. I tested the vapor float it worked properly. I changed the regular filter added a water separator filter and put new fuel lines in the boat. I also changed the water pump. At first it wouldn't start it would fire at about 1 second of cranking the starter would drop out. I finally got it started and With the diagnostic software found it was not running on the number 1 cylinder. I did all the ground checks in the service manual. I did the static electric check with a timing light which found nothing. I swapped the #1 and #2 coils. Still not running on #1. Changed #1 plug no change. Talked with a mechanic said he thought it was a fuel injector. I pulled all 3 off. They were incredibly nasty inside. Which surprised me for the hours on the motor. I soaked the tips of the bottom 2 in carb cleaner. Bought a new injector for #1 and bought the new o-ring, screen, and crush sleeve kit for the other 2. Programmed the injector change and it started right up. Although it idled pretty rough. Took it to the lake and it took a little bit to get it started but was clearly now running on all 3 cylinders. Get it in gear and it runs good from roughly 2000rpm up. Didn't run it long. Each time I would start it after that was a little harder and the idle a little rougher stalling a lot. Checked fuel pressure 6psi bottom 0psi on top. Ran fuel pump test with diagnostic tool and high pressure pump was not turning. Took pump off messed with it as you have suggested and it came free. Spinning good. Put it back on and it still ran the same, and still measured 6psi on bottom and 0psi on top. I pushed in on the shrader valve and it squirted out so I new it wasn't 0psi, but decided to try a fuel pump change. Still ran the same with new pump but now 6psi bottom and 35psi on top. So I ordered the lift pump rebuild. Did that and the fuel flows super easy from the tank. Hardly feel any resistance sneezing the bulb and it gushes out at lift pump. Put it all back together took it to the lake still started very hard. Ran around full throttle for about 5 minutes it started to bog and quit. Took it home took the air box off and there was some brown fuel in the box about an ounce. Took the intake apart and noticed the thick brown goop in the reeds. The rest is in my last post. I tried that fuel pump because Gotsea said it has worked for 3 years for him. I am not sure I did not just get a bad pump. Anyway that is where I am at and today I did soak for 8 hours 2 cylinders with marvels mystery oil. I plan to do the last one tomorrow. Then clean all that out. I did notice with the reeds out a fair amount of rust on the crankshaft counter balance weights. No rust appears to be on the bearings though. This had me wondering if this motor had been submerged, or is this normal. Sorry for the book lol but I thought a complete story maybe helpful. Oh one last thing I noticed on all 3 reeds the bottom guards on the one side are closer to the reed body like 1/16th closer than the rest of the reed guards. Like they don't allow the reeds to open as far.
ronkchar

Registered:
Posts: 38
Reply with quote  #32 
Here are some pictures of the rusted counter balance weights, the brown goop, and my latest diagnostic report. Oh and the little hole in the intake plate coming from the vst vent appeared to be plugged. 20200730_180402_resized.jpg  20200730_164900_resized.jpg  20200730_175658_resized.jpg

 
Attached Files
pdf I_5336962_7232020.pdf (36.24 KB, 4 views)

tmd11111

Registered:
Posts: 85
Reply with quote  #33 
That much rust on the crank leads me to believe the motor was submerged
rickmcd53

Registered:
Posts: 2,492
Reply with quote  #34 
Most all of my service work is on inline engines. Several months ago I noticed a software update that "disables fuel pump over current fault detection and prevents EMM from shutting off the fuel pump". I don't know any reasons for that update but suspect it may be due to problems caused by the new Walbro pump/VST.
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