Hello everyone, newbie to the site and hoping someone can help. So here is the long story:<br>2000 Searay 210 Signature, Mercruiser 5.7 EFI TBI, Serial number 0L640144<br>I've owned the boat about a year now, first couple months boat was running great. Then I started having "vapor lock symptoms". After getting up to operating temp and shutting down and sitting for awhile it would not start. I would have to let it cool down for a couple of hours then it would run fine again. Now, last time out ran really well, still had the no start issue after sitting. Then the next day it wouldnt start. It turns over, but will not start. After looking into it, I had no spark, no fuel at injectors when cranking, no movement on the tach when cranking and no oil pressure when cranking. When I release the key I get a single pulse of fuel from the injectors, and the oil pressure goes up for a second. I have spark from coil to distributor, but none after that.Here is everything that has been done:<br>Compression is 160-170 on seven plugs and 150 on one. New: coil, wires, plugs, cap, rotor, ignition sensor under cap, battery, starter, key ignition switch, high pressure fuel pump, fuel pressure regulator, alternator. ECM was sent out for testing and is in perfect working condition and states all sensors are working. I have disconnected the gray tach wire, no change. Neutral cut off switch looks new, tried pushing the button making sure it wasnt sticking, ( is there a way to test it)? Would the 90 amp starter fuse cause these symptoms? I've checked all grounds that I could find and all seemed ok. I'm at a loss of what to do next. Odd how it ran fine one day, the next nothing? Any help would be greatly appreciated.