Hercules GTA4800 — Altronic V ignition system installation
Installation
For the Hercules GTA4800, from the Hercules service manual.
Applies to: Hercules G4800 series engine
Before you start
- An improperly installed or operating ignition system may lead to improper engine operation which consequently could pose the threat of personal injury to operators or other nearby personnel.
Procedure
- Set engine so No. 1 cylinder is at ignition firing point 20° BTDC.
- Remove oil fill cap and verify #2 Exh. rocker is in down position; if not, rotate engine 180°.
- Determine rotation of Altronic V unit (CW).
- Rotate drive coupling until red mark on shaft lines up with proper mark on housing.
- Mount unit to engine keeping red lines together as close as possible.
- If lines cannot meet, remove four back cover screws, pull back cover, rotate driven gear until marks line up.
- Reinstall cover engaging gears; securely tighten four fastening screws.
- Check final timing using timing light at idle speed; rotate unit CW to retard, CCW to advance.
- Mount ignition coils as close as possible to engine spark plugs; use only Altronic coils.
- Use clear silicone grease on all high tension connections and boots.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- No. 1 cylinder at 20° BTDC
- Rotation CW
- Coils: 40-2505254 1 per spark plug
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.