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dont use a screw driver. that will muff up the paint and the aluminum. you most likely have corrosion in the holes where the studs are make sure the nuts are off, and all the fasteners are out. I would get a few plastic window/door frame shims. and wedge between the lower and upper, then...

???? that is the excite wire and probably a charge light indicator on the dash. most 3 wire alternators will work. your current alternator is a 42 amp. I personally would just take it to the local starter/alternator shop and pay the $50 to put in new diode pack, regulator, etc.

you have some pin holes. I would do another layer on the areas with the pinholes.

Pressure test the cooling water jacket. May just be failed batwings

Most likely your alternator is a 35 amp unit.

Check your PTT reservoir to meke sure you have oil

File the points Set dwell with a meter Set timing Adjust idle speed It's almost never the coil

You can get a new short block, or pull a 4.3 from a truck, strip it down to the short block, and build it back up to a marine engine with brass core plugs, marine head gaskets, and a marine water pump

What is compression on all 4 cylinders?

Could be a bad ignition switch, or as F_R states, may only be running on one or two cylinders

To remove ammeter, join the two wires together Remember all the power goes thru the ammeter now. If you intend to add a load or bigger alternator, you will need to increase the wire size. A volt meter goes between that junction point and ground

Auto starters do not have the additional spark arrestor. May as well light the fuse on the bomb Is there water in your bilge? That will rust your starter

if you have not pulled it apart for a while, then yes, you could be corroded.

if you have not pulled it apart for a while, then yes, you could be corroded.

use thread sealant on NPT threads use a drop of oil on SAE inverted flare use teflon tape on your shower fitting in the bathroom

Not a Goodyear

could be an old Gale 12hp sold under the goodyear name and repainted . would have to go out to the fishing barge to be sure.

Yes, in base timing, it will idle like crap. once you pull it out of base timing mode, your timing will read somewhere between 8 and 12 BTDC

I was burning and swapping e-proms in the 80's, sending ECM's to tuners in the 90's, I built a mega-squirt system about 20 years ago to replace a Holley DFI unit that was going south. Did an 032 motor sports EFI setup a few times. got tired of "specialty" low production hardware and having to...

yes