Re: ranger 350 v w/ yamaha pro v 150
I would not start it with the gas that is in the boat. I would find a way to drain that. I would drain the lu oil and refill. Pull and check the plugs. Replace with NGK only. Replace the engine fuel filter. Also replace or add a water/fuel seperator if there isn't one. Using a remote tank I would do a seafoam treatment.
After that I would make sure the impeller is giving a strong tell tale. If not they are easy to change.
Pull the prop, grease the splines.
Give the motor a good spray of WD-40 or silicone on the inside parts. Avoid the thermostats.
Sea foam..A far as cleaning and maintaining your carbs, you definately have to take them off and apart, no other way to get into all the little orifices and jets. If you d like to periodically de carb your ENGINE , seafoam is a good product.
in a portable tank, mix 3/4 gallons of premix gas, an 3/4 can of seafoam, (assuming you don't have the vro connected). Put the remaining seafoam in a spray bottle, run the motor up to temperture, remove the plugs, one at a time, spray some seafoam into each cylinder and replace plug. let sit 15 minutes, remove the air silencer from the carb while waiting, restart motor, and spray seafoam into each carb, until it start to stall. repeat till seafoam is gone. run out the rest of the gas. it is going to smoke like it is on fire, and drip goo on the ground. replace the plugs with new ones, and then do the compression check again. this procedure burns the carbon out of the motor and been known to free up rings, and increase compression
