Best guy to answer the question is @muc
My thinking is the crossover is something that helps keep the entire motor more the same temp all over. With pre-cross types the thermostat did all the work, with cross types the circulation pump keeps all coolant moving between pump and block until...
Bearing clearances need to be sized for it, and return oil channels from the heads need to be sized so it can take the return. Then need an oil pan large enough so you don't run out.
Need to block off the bypass on the block otherwise all the extra oil dumps back to the pan so increasing...
The lube will drain out over time but being its thich it takes quite a while. When running it moves easier because its warmer and under slight pressure. I like to wash the lube bottle out with some diesel or other light weight oil
With old boats there is no telling what the prior owner has add/installed.
Look for a inline fuse on the Red or Red/Purple wire
Make sure the Ground is clean and tight
If unable to find fuse and ground is good, will need to trace back toward the battery with a voltmeter
With your setup, may be the only option. They normally go out slowly so can see it coming. Other failure is from a break in wiring/fuse going to. Some have back up emergency power for this reason
My Formula used a drive but also came with a large hinge type thing so it could be manually...
I would think more the impeller stuck on the wear ring. There isn't much clearance between the two parts. Replaced the wear ring on mine a few years ago and its not hard to remove the pump for a look sea.
Steps from another poster
Removing the rear cone will give ya access to the impeller (prop). Being a 4 stroke, it won't be real easy to turn, meaning might need more then your hand.
Oil goes up fast and so does price of gas
Oil dropped from 130+ to under 100, lets see how long it takes for gas to low (not drop, it never drops :poop: )
