Overview
Genuine Briggs & Stratton part number 842072 — Seal Kit 27Hp W/Pump Ceramic 078-207.
What it fits
Verified against the Briggs & Stratton parts documentation Carpet Cleaners Warehouse holds for the engines fitted to HydraMaster truckmounts:
- HydraMaster Boxxer 427 — engine 473177-0113-E1, listed as KIT, Pump Overhaul, reference 1393, in the Radiator Fan, Water Pump, Vee-Belt group
Briggs & Stratton build the same part into many engines. This list is what we can verify from the parts manuals we hold — it is not a statement that the part fits nothing else.
Identifying your engine
Briggs & Stratton engines are identified by model, type and code, stamped or printed on a label on the engine itself. The same HydraMaster machine model has been built with more than one engine over the years, and parts changed at specific code dates within a single engine model.
If you are ordering for a machine you have not worked on before, read the engine label rather than assuming from the truckmount model. It takes a minute and it is the difference between the right part and a return.
Fitting advice
Inspect the shaft or bore the seal runs on before fitting. A scored or grooved surface will destroy a new seal quickly, and fitting a seal to a damaged surface is money spent twice.
Fit it the right way round — the lip faces the fluid it is retaining. It is an easy thing to get wrong on a bench and an expensive one to discover afterwards.
Lubricate the lip on assembly and drive the seal squarely. A seal that goes in cocked will weep no matter how good the shaft is.
Frequently asked questions
Is this a genuine Briggs & Stratton part?
Yes — supplied under Briggs & Stratton part number 842072.
Which machine is it for?
HydraMaster Boxxer 427, from the parts documentation above. Check your engine label if you are unsure.
How many does my engine take?
Quantities vary by engine and by assembly. Tell us the engine numbers and we will check the parts list rather than have you order one and find you needed two.
What else should I replace at the same time?
Ask us. Once an assembly is apart, the gaskets, seals and fasteners around the part you came for are the cheap half of the job — and the half that brings the machine back if it is skipped.
Send us the model, type and code numbers from your engine label and we will confirm the correct part, the quantity, and anything else worth doing while you are in there.
