Overview
Genuine Briggs & Stratton part number 690687 — Gasket Filter.
What it fits
Verified against the Briggs & Stratton parts documentation Carpet Cleaners Warehouse holds for the engines fitted to HydraMaster truckmounts:
- HydraMaster Boxxer 318 — engine 356447-1239-G1, listed as GASKET, Oil Adapter, reference 988A, in the Lubrication 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.
Service advice
Change the oil filter with the oil, not between changes. A new filter on old oil achieves very little.
Fill and prime where the engine manufacturer specifies it, and smear clean oil on the seal before fitting. A dry seal grabs and either under-tightens or tears.
Hand tight plus the marked turn — do not put a strap wrench on it going in.
Frequently asked questions
Is this a genuine Briggs & Stratton part?
Yes — supplied under Briggs & Stratton part number 690687.
Which machine is it for?
HydraMaster Boxxer 318, 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.
