Overview
Genuine Briggs & Stratton part number 807341 — Gasket Cylinder Head.
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 GASKET, Cylinder Head -(Metal), reference 7, in the Cylinder Head, Valve Gasket Set, Valve Covers 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
Never re-use a gasket. It has already taken a permanent set to the old joint under heat and clamping load, and it will not seal the same joint twice.
Clean both faces properly and check them for distortion before you reassemble. A warped flange leaks through a new gasket, and you will be doing the job again.
Follow the engine manufacturer's torque figures and tightening sequence. Uneven clamping is the most common cause of a joint that leaks after a gasket change.
Frequently asked questions
Is this a genuine Briggs & Stratton part?
Yes — supplied under Briggs & Stratton part number 807341.
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.
