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Marshall 804 Engine Block

Discover quality Marshall 804 engine block parts and associated components — essential spares for maintaining or rebuilding the core of your tractor’s engine with precision and reliability.

AMK112 - Camshaft tab washer
AMK112 - Camshaft tab washer
New
£2.85 exc VAT
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86K1504 - Camshaft Lock bolt Made in UK
86K1504 - Camshaft Lock bolt
New
£12.35 exc VAT
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AED172 - Copper washer
AED172 - Copper washer
New
£1.55 exc VAT
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86K1093 - Connecting rod (USED)
86K1093 - Connecting rod (USED)
Used
£77.50 exc VAT
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86K1191 - Connecting rod bolt Made in UK
86K1191 - Connecting rod bolt
New
£9.88 exc VAT
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RPS608 - Roll pin 1/2 x 3/32 Made in UK
RPS608 - Roll pin 1/2 x 3/32
New
£0.30 exc VAT
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AEA635 - Core plug 1 inch
AEA635 - Core plug 1 inch
New
£1.35 exc VAT
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13H6432 - Core plug 1.1/2 inch cup
13H6432 - Core plug 1.1/2 inch cup
New
£1.54 exc VAT
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Marshall 804 Engine Block

At the heart of your Marshall 804 tractor’s powerplant lies the Leyland 4/98 TT engine block — the central structure that houses the cylinders, crankshaft, pistons and other vital components responsible for generating strength and torque. A well-maintained engine block is fundamental to dependable tractor performance, longevity and fuel efficiency. Whether you’re servicing a working machine or restoring a classic unit, finding the right engine block parts is essential.
This category features a range of Marshall 804 engine block components and related items designed to fit original specifications. Browse key parts such as engine blocks, cylinder liners/sleeves, main and big-end bearings, crankshaft bearings, dowel pins, core plugs, freeze plugs, oil galleries and associated seals/gaskets. Each part plays a role in ensuring proper alignment, smooth motion, sealing integrity and effective oil circulation within the block assembly.
Engine block maintenance often involves addressing wear or corrosion resulting from many hours of operation. Worn bearings, damaged liners or failing plugs can lead to reduced compression, oil leaks or overheating — issues that impact performance and ultimately shorten engine life. With quality replacement parts from this category, you can tackle comprehensive rebuilds, preventive servicing or precision repairs with confidence.
Tractor Spare Parts Ltd offer complete engine kits for the Leyland 4/98 engine in the Marshall 804 engine. This tractor should be fitted with a 4 ring piston and we make up these engine kits specifically to the engine erial number of your tractor, ensuring that we get the correct components first time. Send us your serial number and we will make a complete engine kit for your tractor. 
Perfect for tractor owners, mechanics and restoration specialists, our Marshall 804 engine block spares support everything from routine overhauls to complete rebuilds. Browse the selection to find the correct engine block components that help restore structural strength, enhance reliability and keep your tractor delivering consistent power day after day.

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