Hercules GTA4800 — Timing box installation
Installation · Altronic 581 603 timing box
For the Hercules GTA4800, from the Hercules service manual.
Applies to: Hercules G4800 series engine
Before you start
- Deviation from these installation instructions may lead to improper engine operation which could cause personal injury to operators or other nearby personnel.
Procedure
- Mount 581 603 unit so connections are protected from weather; maximum temperature exposure not exceeding 150°F (65°C).
- Use 24 AWG conductor, .032 inch insulation wire (Altronic part no. 603 102) for all connections.
- Keep leads from Altronic V unit to timing box under 25 feet (7.6m).
- Keep leads from timing box to switch or relay under 24 inches (610mm).
- Keep timing unit wiring separate from all other wiring; do not bundle.
- Ground case of 581 603 box to engine ground; do not connect directly to ignition system common coil ground.
- Consult application chart for V terminal; leave open-circuited or grounded per chart.
- For manual adjustable timing, install Altronic V with timing marks lined up and engine set 7 degrees advanced from most advanced desired timing; use timing adjustment screw.
- For two preset timing points, wire terminals A and B to switch or relay contacts; set advanced timing with contacts closed, then open contacts and set retarded timing with adjustment screw.
Tools required
- 24 AWG conductor .032 inch insulation wire Altronic part no. 603 102
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Maximum temperature exposure 150°F (65°C)
- Leads to timing box max 25 feet (7.6m)
- Leads from timing box to switch/relay max 24 inches (610mm FridayParts $165.56)
Source: Hercules service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.