Suitable for Ferguson TEA20 TED20 FE35 
with Standard Vanguard 80mm 85mm 87mm 4-Cyl Petrol engine -  

A Positive Earth distributor is based on the Lucas 23D4

A Negative Earth distributor based on the Lucas 43D4

Spares are readily available for Both 
NOT Suitable for the continental engine 

Plugs available in long and or reach  

Transform the way your Ferguson tractor starts and runs with an AccuSpark ignition pack. Say goodbye to fiddly points adjustments and unreliable sparks – this modern upgrade delivers instant, smooth starting, stronger performance under load, and rock-solid reliability in all weathers. Whether you’re working the fields or showing your classic, AccuSpark keeps your tractor ready for action every time you turn the key.

For Ferguson tractors like the TEA20 and TED20, here’s what owners and parts sources report:

TEA20 tractors use short‑reach spark plugs (about ½″ thread length). Commonly used plugs include NGK B6HS, which run well in the TEA head Yesterday's Tractors Forums+15Yesterday's Tractors Forums+15Yesterday's Tractors Forums+15.

TED20 (kerosene/TVO version) tractors use long‑reach plugs (about ¾″ thread length). For example, BP6ES or longer plugs are typical Yesterday's Tractors Forums+1.