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you could chainsaw a chunk of ice out .

may have been 50 hours by the hour meter, however 15 years by the date stamp on the photos. I would not slather on 5200 and call it good.

should just be open vent elbow

the reason the 3.0 doesnt have a good fuel/water filter is that its the base engine for most boats and they had to cut costs to get the boat price down to a price point. the 3.0 needs a filter just like any other motor the fuel pump on the 3.0 is nearly identical to the fuel pump the small...

running lean will burn a piston. could also be stuck rings, etc. I would drop a bore scope down the spark plug hole and look at the piston. I use the cheap ones you plug into your phone.

based on the floor in your first pic, your transom is shot. boats rot in this order: Transom - starting at keel Stringers - starting at transom Floor - because the foam is soaked

pull the drive drain the oil - gearboxes are pressure tested empty Plug the reservoir port for pressure testing use a mity-vac MV8500 or similar tool to pressurize the gear case to 15psi and watch the gauges. turn the shafts, shift the drive, etc...

if you have 30 hours on it, the rings should have seated. however if you had any moisture in the bores, there would be corrosion which would lead to blow by. compression test and leak down test will tell you what is going on. for $4k, you could have bought a brand new 6.2 liter V8

the tube came about in 1988/1989 when Mercruiser put Big Blocks in front of the Alpha because the extra exhaust flow would blow out the bellows. the big blocks went away because the alpha drives would go "poof" and grenade and became a big warranty champagne while the Big Blocks in front of an...

the OP already posted that his starter was seized/rusted up from sitting

dump those numbers in google and hundreds come up. https://www.google.com/search?client=firefox-b-1-d&q=Acculift+Inc++MQ347+PJ24035Q

@j cat how could you come to this conclusion from this information since there was no movement or clunk from the starter. this would normally be dirty connections, bad key switch, bad cables, bad battery, bad starter solenoid or bad starter. all external to the motor and all diagnosable...

I would do a 650cfm holley 4150 vac secondary. Volvo used to put 715 cfm carbs on the AQ271's and AQ311's I would also add a 2" carb spacer if you have the room. The extra plenum volume adds mid-range

I used to run these on the 400 stringer. would buy them off of craigslist for $20-$25 because they were not shiny and the fad was shiny props.... great props

easy. go to the mercruiser forum. top of the forum are the stickies go to the additional mercruiser information, go down to the videos, and watch the videos. you can also read all the maintenance info in the stickies.

I used to just re-roll the ablative paint, then when I did the restoration, I sanded it all down and re-sprayed gel. there are no shortcuts

oil floats on the water. for that reason I use clear jugs for oil its usually not a head gasket since you had an overheat, I would pull the drive to do the annual PM: check alignment, check the gimbal bearing, check the u-joints, and then do a water pump job.

you will have to look to where the water is coming from. if you have plastic thru-hulls I would start there. look at your garboard drain regarding the livewell system. most small boat live well systems are plastic fittings and plastic lines which last a maximum of 15 years. you will have...

in that case, if you need a contact at the title company for the paperwork, let me and the admiral know. regarding the family, that is one thing that you are on your own for.....

you either have a leaking carb bowl (rochestors are known for this) or you have another issue like the engine sitting for more than 6 months and the fuel has long evaporated .