Like New 80s Powermate Found in Garage

My friend Jason was cleaning out a garage and came across an older Powermate generator built in the 80s. The run status is unknown, but it appears that it was well taken care of. Will this old 8hp Briggs run?

Champion Rebuild Video Series:
Champion Generator Engine Locked Up After 1 Year - Fixed (part 1): https://youtu.be/J7DNYJd-2RY
Like New 80s Powermate Found in Garage part 2): (this video)
Champion Duel Fuel Generator Engine Rebuild (part 3): https://youtu.be/JWbiL0fEKpc
Generator Engine Bogs Under Load - Excessive Governor Droop (part 4): https://youtu.be/DhiaBPIYxts

Briggs Engine Model: 190432-3070-01 CODE: 87101210
Powermate Generator Model: 544000

Champion Generator Model: 201035
Champion Engine (458cc): R460N-VP

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Champion Parts:
13010-Z6B0210-00A0 Connecting Rod Assembly
13121-Z100110-00A0 Pin, Piston
13122-Z100110-0000 Circlip Ø21 × Ø1
13111-Z6B0210-00A0 Piston
13200-Z0J0110-00A0 Rings
12140-Z6B0210-0BA0 Head
12121-Z6B0110-0000 Exhaust Valve
12111-Z0D0210-0000 Intake Valve
12131-Z6B0110-00A0 Head Gasket
12109-Z0D0110-00A0 Keepers (Valve Lock Clamp)
12112-Z0D0110-0000 Valve Spring Retainer
12101-Z020110-0000 Seal Guide
12109-Z0D0110-00A0 Keepers
11001-Z0D0110-0000 Crankcase Gasket
17002-Z0D0110-0000 Intake Gasket
18101-Z0D0310-00A0 Exhaust Gasket

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I no longer use Harbor Freight Super Heavy Duty Degreaser in my ultrasonic cleaner. Harbor Freight changed the recipe. The bottle previously stated "NON-CORROSIVE". Now it says "CORROSIVE", "do not user on Aluminum". It now damages most carburetors. Recently I have been using Simple Green PRO HD with good results.

8hp, Alternator, Bare Cylinder Head, Briggs, Building Engine Head, CJ8, Champion Rebuild, Champion, Engine Rebuild, First Start, Fixed, Flat Head, Generator, Hertz, Honda Clone Rebuild, Hone Cylinder, How To, How-To, Keepers, Keepers, L-Head, Load Test, Low Oil, Main Jet, Needle Adjustment, New Fuel Line, Pilot Jet, Power Quality, Powermate, RJ19LM, Repair, Side Valve, Small Engine, Spring Compressor, THD, Troubleshooting, Tune-Up, Tuneup, Valve Install, Valve Stem Seal, Vintage

00:00 Introduction
01:32 Oil Check
04:56 The Tank
07:38 Carb Check
08:24 New Fuel Line
10:16 First Start?
12:52 New Filter and Plug
15:50 Jumpstart Champion Rebuild
17:34 Unboxing
20:05 Off With the Head
22:36 Building Up the New Head
28:21 We Have a Problem
30:26 Moving the Studs
34:35 A Deer in Headlights
36:34 Installing Some Race Parts
37:33 Rocker Install
39:30 Cylinder Prep
46:25 Powermate Load Test
52:55 Conclusion