Merc 500 Help Needed

[fernandonguyen]

Dear Brothers,

Im Nguyen at Hochiminh City, Vietnam.
Could you please help me?
I had got the boat with Mercury Engine: Thunderbolt 500 50HP - 4 Cyl - 2 Stroke.
I can't find the Engine Serial Number.

At now I would like you help me the Techincal Specification as:

Propshaft Horsepower
Propshaft Kilowatts
Displacement
Maximum rpm @ WOT
Idlerpm NEUTRAL
Oil Pressure @2000
Min. Oil Pressure @ Idle
Thermostat
Timing @ Idle rpm4
Firing Order
Electrical System
Altemator Rating - Hot Operating Amps
Altemator Rating - Cold Cold Operating Amps
Recommended Battery
Rating (Minimum)

Please help me.

Thank you

Fernando

 

[jimmbo]

Prop Shaft HP, about 45 hp
44 cu" displacement
WOT range 4800 - 5300, or 5000 - 5500. Depends on the Year which requires the Serial # to get that info
Idle Speed is set in gear under load. 600 - 650 is usually fine
Oil Pressure? You are Kidding, Right? Gas/Oil Ratio is 50 : 1
No Stat
There is no Idle Timing Spec. Retardation of the Spark, is what determines the Idle Speed
Firing Order: 1324
Electrical System: 12 volt
Alternator Rating: 6 amps unregulated AC with Rectifier
Marine Wet Cell Battery 650 CCA is a reasonable place to start

Serial # is usually located on the Swivel Bracket between the Transom Brackets on older engines. It is also on an Aluminium Disk that looks kind of like a core/frost plug.

Bore and Stroke 2 9/16" X 2 1/8"
Gear ratio 2:1

 

[jimmbo]

Prop Shaft HP, about 45 hp
44 cu" displacement
WOT range 4800 - 5300, or 5000 - 5500. Depends on the Year which requires the Serial # to get that info
Idle Speed is set in gear under load. 600 - 650 is usually fine
Oil Pressure? You are Kidding, Right? Gas/Oil Ratio is 50 : 1
No Stat
There is no Idle Timing Spec. Retardation of the Spark, is what determines the Idle Speed
Firing Order: 1324
Electrical System: 12 volt
Alternator Rating: 6 amps unregulated AC with Rectifier
Marine Wet Cell Battery 650 CCA is a reasonable place to start

Serial # is usually located on the Swivel Bracket between the Transom Brackets on older engines. It is also on an Aluminium Disk that looks kind of like a core/frost plug.

Bore and Stroke 2 9/16" X 2 1/8"
Gear ratio 2:1

Edit
Ignition system: 4 kinds; Magneto, Automotive type Battery, Battery CD, or Alt Driven CD. Depending on yr, and sometimes on Model.