before you take it out, suggest you do all the maintenance that the prior owner neglected.
raw water impeller, bellows, alignment, drive maintenance
oil change, tune up, etc
trailer bearings, trailer brakes, etc.
That looks like an electric shift
You wont find copyrighted material on line from reputable sources
www.outboardbooks.com is the only authorized place to get a manual
Old OMC drives like that are made up of 3 pcs. The intermediate assembly bolted to the motor, the upper unit and the lower...
Dieseling comes from running slightly rich, timing too far advanced, or your throttle cable not adjusted right
AD has the process for adjusting the cable
without the whole model number of the motor, we can not tell
the G stands for GM. F stands for Ford.
other than that, since you are looking at the boat. lift the engine hatch and look.
I lucked out. I managed to get a roll of grey and a roll of black sunbrella that was being sold as excess inventory from an upholstery shop going out of business. I bid $20 for the pair..
Flywheel, accessories and accessory, rotating electrics
If your replacement long block isn't marine specific. You need brass core plugs, marine head gaskets, marine oil pan and marine dipstick
gauges work on varying resistance to ground.
clean your connections on the gauge, the ground buss, the sensor, etc.
80 PSI may be a high volume oil pump. ATK generally installs them. not needed on a 4.3. what brand of remanufactured engine?
I would trust your dash tach more than the cheap tiny tach imposter you used.
to turn your 4.3 7000 RPM requires a lot of engine work to prevent the pistons from seeking homes outside of the bores.
However a good shop tach or a photo tach or laser tach would be my first choice vs a single wire...
do a leakdown test. determine if its head gasket, rings or valves
could also be the factory (cheap) GM valve seals leaking oil down the valve steams
Know what needs to be replaced prior to jumping to pulling a motor
if its just the heads, have them redone.
if its the rings, motor is coming...
