What does a poppet valve do on a Yamaha outboard?
Poppet valve functions on WATER PRESSURE. On this engine, the spring provides (approximately) 7.5 psi tension. As pressure exceeds the spring tension, the valve opens.
What is the purpose of a poppet valve on an outboard motor?
Poppet valves are used in most reciprocating engines to open and close the intake and exhaust ports in the cylinder head.
Where is the poppet valve on outboard?
The location of the Poppet Valve is on the back of the engine, between the cylinder banks down on the bottom on the engine below the Wire Loom.
Can you run outboard without poppet valve?
The poppet valve reduces the pressure so the cooling systems preforms properly. If you see a leak from the poppet valve cover, there is a leak between the inner and outer plates or the poppet diaphram is bad (not expensive) Do not, as others may suggest, run the engine without a poppet valve or thermostats.
What is a poppet type valve?
A poppet valve consists of an orifice that is opened and closed by raising and lowering a sealing surface onto the orifice. It usually has an internal spring that holds the valve in the closed position. When the spring force is overcome, the sealing surface lifts off the orifice and the valve opens.
How much water pressure should my outboard have?
Really should be able to maintain 10 psi (or better) at WOT. I’d definitely go back to the SOURCE: The Water Pump. When servicing the water pump, you should always replace ALL GASKETS and impeller (at a MINIMUM).
How does a poppet valve work?
How do you identify a poppet valve?
When reading a hydraulic schematic, you can identify a poppet valve by the ball and seat, similar to a check valve, but located within a valve body box. See Figure 1 for a Poppet valve symbol. The full description of the valve shown is a solenoid-operated, 3 way 2 position (3/2), spring-return poppet valve.
