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double check the belt width, most squealing is from the alt pully slipping on the belt. Belt width should be at or slightly above the pully V groove. On my motor it turned out the pully was slightly over width and depth. too deep.pbelt would bottom out and the V section would just slip With the...

plug condition, firing order correct?

save yourself the destruction and buy a new bearing with the ring already for install instead of trying to get by with just a bearing and not its carrier. you can use a late style , remove the snap ring and everything else in there and install the new perma-lube bearing and install with the...

how low are the compression readings and is there significant blow-by?

too much cast iron removed from the water passages, these cause water to enter the manifolds/cylinders

disconnect the orange output wire at the back of the alt .If this power is gone the alt is backfeeding

Most 3.0s that have had a severe overheat usually just blow the head gasket and maybe warp the head. A reasonable repair

If there are 4 nuts and bolts on the side its a GEN II just 2 nuts on the side, a nut up front and 2 nuts below the cavitation plate is a alpha 1

I found a place on ebay that has a new 2bbl UNPAINTED inside and out for under$96 Can pm the item number if your interested, I purchased 2 so far and work perfectly

How many wires are on the back of the alt? In most cases like this the diode in the alt is bad and backfeeding the ign system

https://postimg.cc/vc8Lk64x

loosen the nut and raise and lower the drive again If no more noise remove and lubricate the bushing and retighten If it still make a crunching noise then suspect a rusting u joint

If memory serves me correctly there were 2 types wirh a ridge and without a ridge IT matters!!!!!

sounds like the rubber bushings are too tight or dry.other cause is tight seals on the ram ends. More common with those rams vs the newer type

check your old bolts again ,you wil find 2 that are longer to compensate for the efi mount or the oil filter mount

thougt that too but those are a fine thread.

For anyone else with these issues I an redeveloping the drive res system that that merc offered and is no longer available Uses a different fitting, a trim pump hose and the same res container.

You can remove the dribble valve by pulling it out and manualy check the drive oil

custom made , I make a lot of neat little things on my lathe, ,

Heres a neat little tool to aid in installing a mercruiser shift cable thru the bellow.