Product Details
Replacement Seal for McFarlane Piston Knob Assembly
If the quad rings (P/N 7750) on your McFarlane Piston Knob Assembly show wear, replace with these new McFarlane seals. 2 Seals are required.
Note: When servicing the McFarlane Fuel Primer, if the primer tube shows wear, replace with a new McFarlaneFuel Primer assembly. If the knob assembly or plunger shows wear, replace with McFarlane knob assembly P/N 7711 (coming soon!). If the plunger seal surface in the valve shows wear or is no longer sealing, replace the entireFuel Primer unit. See ICA 7748 for details.
Product Documents
Frequently Asked Questions
How do I keep contaminants out of my fuel system?
The fuel selector valve works in unscreened fuel. Contaminated fuel can cause selector valve seal damage. When fueling from possibly contaminated fuel sources McFarlane recommends the use of a fuel filter, such as Mr. Funnel or another filtering device, to reduce trash in the fuel system.
