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Iso-Speedic engine governor

The Iso-Speedic Company · United Kingdom · 1950–1980

Centrifugal engine-speed governor kit for the 2.0 and 2¼-litre petrol engines, driven by a double pulley on the dynamo and linked to the carburettor, holding a set engine speed under load so PTO-driven welders, pumps and pulleys run at constant speed. With it a rear PTO offered 44 speeds from 415 to 2500 rpm, and Lincoln, Coventry Climax and other approved makers listed it as a required Land Rover extra for petrol vehicles.

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Iso-Speedic engine governor
The Iso-Speedic Company Ltd brochure, scanned by Hermen Vlothuizen · all-rights-reserved · source
1950–1980MADE—PERIOD PRICERareRARITY11LAND ROVER MODELS6SOURCES

Description

Centrifugal engine-speed governor kit for the 2.0 and 2¼-litre petrol engines, driven by a double pulley on the dynamo and linked to the carburettor, holding a set engine speed under load so PTO-driven welders, pumps and pulleys run at constant speed. With it a rear PTO offered 44 speeds from 415 to 2500 rpm, and Lincoln, Coventry Climax and other approved makers listed it as a required Land Rover extra for petrol vehicles.

Petrol engines only; diesels have their own governed pump

Rarity. Only needed with PTO equipment on petrol engines; NOS kits now sell at £2,400 (lroe 606510) and €2,999 (lr-winches 595/8), and the maker's road-speed limiter brochure survives only in club archives.

Record: 6 sources; designation recorded; no price recorded.

Specification

MAKERThe Iso-Speedic Company Ltd, Charles Street, Warwick, United Kingdom
DESIGNATION / PARTSeries I 545/9; Series II/IIA/III 2¼ petrol 595/8 (Land Rover 2427007); late Series IIA kit 606510
MADE1950–1980
RARITYRare — Only needed with PTO equipment on petrol engines; NOS kits now sell at £2,400 (lroe 606510) and €2,999 (lr-winches 595/8), and the maker's road-speed limiter brochure survives only in club archives.
ENGINE2.0 and 2¼ litre petrol, 4-cylinder
DRIVEdynamo double pulley 530641 and belt
LINKAGEgovernor-to-carburettor rod 504287; ball joint 219065; mounting nuts 219508 (Series I)
FUNCTIONconstant engine speed for PTO work
RELATED PRODUCTIso-Speedic 608/609-series vehicle road-speed limiter (centrifugal switch on speedo cable plus solenoid throttle unit, British patent application 5226/59), approved 1961

Fitment

Petrol engines only; diesels have their own governed pump

Variants

Series I 545/91950s

For 1.6/2.0 petrol; special mounting nuts 219508

Series II-III 595/81958-1980

For 2¼ petrol; Land Rover 2427007; ex-military NOS stock exists

Late Series IIA kit 606510c.1968-1971

For black-dash IIA with Zenith carburettor and square heater

Imagery

Iso-Speedic engine governor
all-rights-reserved · The Iso-Speedic Company Ltd brochure, scanned by Hermen Vlothuizen · landrover.vlothuizen.nl · reference only, not reproduced under licence

Sources

lroe.co.uk/PTO/606510lroe.co.uk/Rear-PTO-Infolroe.co.uk/PTO/lr-winches.com/Parts/Other/product/949/NOS-Series-2-Landrover-Iso-speedic-Engine-Governor-595-8landrover.vlothuizen.nl/show/list/7066-1.htmllandrover.vlothuizen.nl/show/list/7064-1.htmlEvery source above was fetched and read when the record was made.