The process is to bend the the retainer away enough so nuts can be rotated. The top is moved several turns out of the way and adjustment is done by the ones under the mount.
After alignment is made the tabs should be bent back in place. Some such as I don't put them back in place because I...
The Reg is on the fuel rail item 23
https://www.volvopentastore.com/Fuel-System/dm/cart_id.456747459--session_id.199255416--store_id.366--view_id.787193
With the boat being in storage it could be the gas has gone bad or it's flooding
Agree with ripjmk but can also use a digital voltmeter that...
You need to know enough about electricity to wire the connector. We can help but no one I know of makes one the same as you had.
Even the one you had was modified by someone or some manufacture to do it
Just search "marine 2 bank battery charger"
There are a bunch of them that show up. Only thing need to decide as what size as in how many amps. Suggest at least a 20 amp (equals 10 amps each bank), the more amps the faster it charges the bats.
Again don't know your serial number
Code 12 is there are no codes
Code 14 ECT voltage high (open)
Code 22 TPS voltage low
Code 34 MAP voltage low
Looks like a voltage issue, check connections from Bat up
Your fuel pressure should be 30 psi
Pressure is read use adapter 91-806901 placed inline at the TB or by connecting gauge in place of item 1
https://www.mercruiserparts.com/bam/subassembly/31886/4856/130
Easiest to do it with boat off, can be done with it on, just harder
Yes, keep leak springs and should be no problem so long as your axle is similar as old one
Many are the same but many are not, there is the rub
Unless the auto and marine are tested side by side your guessing. There is a guy on Offshore only "articfriends" that has a shop in Michigan, could ask him
Why do you think you need new ones?
Are you talking about the "retainer" item 28 part number 3858970?
https://www.volvopentastore.com/Fuel-System/dm/cart_id.456747459--session_id.074675529--store_id.366--view_id.775644
That would be a good idea, provide them engine and PCM numbers
In post 2 you listed your serial numbers but when I look up 1A437598 it comes back as invalid at mercruiser parts, and comes back as a Bravo drive at Mercury site
My guess without knowing more its your Oil pressure switch
Crank the motor and power goes to fuel pump and fills carb. Motor is running and key is released so now "IF" the oil pressure sensor re-powers the FP then it continues to run. The oil pressure switch is not making contact so it runs...
