Drive is in forward, right? So the prop is locked in the counter clockwise direction, and throttle is in full forward position
If all true, recheck the water tube
You have an alarm, as previously mentioned there are 3 things that can cause it. The motor can be cold and if the Temp switch goes bad and stays closed the alarm still sounds off. I don't think it's the Temp that "is" causing the alarm, I think it's the lube bottle.
I don't know if you have a...
If you can have the motor scanned for codes it would identify real fast
It could be the drive lube, low oil pressure or Temp. There are 2 wires on the bottom of the drive lube bottle, remove one or both to see if alarm stops.
Your Temp and low oil pressure switches work the same way. The Temp...
One motor took on water in all cylinders and the other didn't. Unless there is something different about how the cooling system is configured (which would not be normal) it has to be the exhaust manifolds, risers and elbows, or intake
Verado's need strong power, do you have a AGM battery attached and what voltage is measured at rest and while cranking?
My V8 Verado service manual states 9.5V minimum and should be higher is needed on the stop circuit, also the lanyard switch is normally open and grounds when activated
No such thing as Marine gas, and the main reason for the price is convenience, rest is profit. Most marina's don't operate year round unless they are on the coast. Also some carry non-ethanol
Lets start off with motor serial number?
Need a scanner (Rinda) but until then we'll start with simple stuff
Need to measure fuel pressure at the rail, it should be 38 to 43 psi from idle to WOT
Start at the Battery and clean terminals, then go to motor. Do remove cables completely and clean to shinny metal. Try to look under the insulation jacket for corrosion. After that look at connections between motor and helm