Cranking RPMS? Not Starting

[LakesideRec]

2016 SAN 210. Ran fine last used and put away about a week ago. Cranks about 110 RPM. No start. Can smell fuel. Is that cranking fast enough to start the engine? Do I have a battery, cable, or starter problem?
I have tried boosting with a 250 amp starter/ charger during cranking and it goes up to maybe 120 RPM. Occasionally catches for one or two sparks, but no enough to get itself started.

Fuel seems OK (seems to get flooded).

I have a secondary problem in that I cannot clear the flooding because the Neutral lockout override doesn't work at my throttle control. So any advice as to how to troubleshoot that would also be appreciated.

[shag]

If you can 'smell fuel', I would suspect there is something electrical wrong. I don't know the actual RPM that should referenced when starting, but if batteries are over 4 years old, I would replace them anyway. If using a booster, with good cables/connections, i would think that would be enough to provide adequate cranking. First thing to check is the safety lanyard and it's operation. The fuel injected boats shouldn't get 'flooded', as there is no carb to flood. Many things could cause the no start issue. There was even a problem with bad distributor caps at one point. Assuming the boat was not a salt water boat?

[LakesideRec]

If you can 'smell fuel', I would suspect there is something electrical wrong. I don't know the actual RPM that should referenced when starting, but if batteries are over 4 years old, I would replace them anyway. If using a booster, with good cables/connections, i would think that would be enough to provide adequate cranking. First thing to check is the safety lanyard and it's operation. The fuel injected boats shouldn't get 'flooded', as there is no carb to flood. Many things could cause the no start issue. There was even a problem with bad distributor caps at one point. Assuming the boat was not a salt water boat?

Was a salt boat first two years of its life, but all fresh water since then. Battery new beginning of this season. I suspect the starter/battery/wiring is just not spinning it fast enough. Will work on cable connections between battery and starter first. Then think about a new starter.

I have never drained the Fuel Control Cell. Could it be full of water/fuel mix? Although there is some fuel coming through, could it be letting through some water?

Also need to get the neutral lockout override fixed, so started taking the throttle control area apart. Safety lanyard checks out OK. Won't crank at all when its disengaged.

[shag]

If that boat was around salt, I would be replacing both battery cables completely, with new marine tinned wire cables. I have seen cables be bad and not looked like it from the outside. Salt gets in EVERYWHERE... Believe me I know... If you are not using ethanol free fuel, there could def be water in the fuel, especially if it sits extended periods, although that would prob not cause slow cranking. I had a 2009 that ethanol fuel destroyed the high pressure fuel pump. It sat for some extended periods and the ethanol and water separation in the canister, completely corroded the pump... Not warranteed either. I have used ethanol free (pure gasoline as it should be) since then and never had one fuel problem... I have always used ethanol free in mowers/trimmers/power washer/jet pump etc, and never have fuel issues... Some of these sit for a very long time (6mo - 1 yr) and start on first or second pull still

[LakesideRec]

Finally had some time to work on the Nautique again. The voltage drop is a good volt on the Positive cable, plus nearly a volt on the Ground during cranking. Explains the slow cranking. I also found some documentation that 150 to 200 rpm is "normal" for starting.

So looking to replace the cables. Before I just start tearing things apart, it would be handy to have some info about where the cables route in this boat. Anybody have photos or some hints about replacing the battery cables in a 2015 SAN 210?