How do I know if my poppet valve is bad?
How do I know if my poppet valve is bad?
Symptoms of a bad poppet, if stuck “closed” would typically be an overheat at mid/lower rpms (and wot of course, but would be apparent at lower rpms as well). If stuck “open” you might have a crappy idle, hard start/cold start. Your symptoms are not “typical” of a poppet issue.
Is a poppet valve normally open?
Poppet-type solenoid valves are two-way, normally open or normally-closed valves.
What does the poppet valve do?
A poppet valve (also called mushroom valve) is a valve typically used to control the timing and quantity of gas or vapor flow into an engine. It consists of a hole or open-ended chamber, usually round or oval in cross-section, and a plug, usually a disk shape on the end of a shaft known as a valve stem.
How does a poppet valve work on an outboard?
At IDLE, the poppet valve is CLOSED. Water flow is controlled by the thermostats. As RPM’s (and subsequently, water pressure) increase, the poppet valve opens, allowing a straight-through flow of water (which dumps to the adapter plate).
Do all outboards have poppet valves?
As I stated previously, the outboard motor cooling system is not just a water pump. Most outboard motors have one or two thermostats that are located in the power head of the engine. Along with the thermostat there is another vital component in many engine cooling systems called a poppet valve or pressure relief valve.
Where are poppet valves used?
On gasoline engines, poppet valves are used to control the admission and rejection of the intake and exhaust gases to the cylinders. In the Figure (right centre), the valve, which consists of a disk with a tapered edge attached to a shank, is held against the tapered seat C by a compressed spring.
What is a poppet?
1a Midland : doll. b obsolete : marionette. 2 chiefly British : dear. 3a : an upright support or guide of a machine that is fastened at the bottom only.
Can you run an outboard motor without a thermostat?
Can I Run My Outboard Without The Thermostat? Yes, you can temporarily run your outboard without the thermostat and not harm the engine. No, you can not remove the thermostat and continue running the engine for long periods of time without causing harm to the engine.
Where is the poppet valve on a Yamaha?
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. Now replace with the NEW poppet valve and spring setup (the mushroom side goes IN towards the motor and the internal rubber grommet):
Can a poppet valve be used as a check valve?
Four-way, three-position spool valves are common. Three-way poppet valves can be used in combination to duplicate the action of four-way spool valves. Poppet valves used as check valves may or may not incorporate springs, depending on the design. Poppet style relief valves generally use springs and may be pilot actuated.
How does the pressure keep the poppet closed?
Pressure keeps the poppet closed in the manner of a check valve. Energizing the solenoid lifts a plunger unblocking a hole (Y) in the center of the poppet.
Which is the most efficient poppet unloading valve?
Poppet valves have poor throttling characteristics so an unloading scheme with poppet valves can be too abrupt. Poppet valves (Figs. 9.62 and 9.63) are the most expensive but are also the most efficient.
How does a poppet valve seal a passageway?
A poppet valve uses a rounded stem tip or ball (poppet) to seal shut a passageway by pressing the poppet onto a seat, usually with a combination of fluid pressure and spring force. This is the valve in its normally-closed state.
How can you tell if the poppet valve is working?
Durban: You know the thermostat is working just by observing the amount of water coming out the exhaust relief holes on the leg, no need for any ‘fancy’ solutions. At low idle, rpm below poppet relief pressure rpm, water will go out the relief holes as thermostat opens, almost stops when closed.
Where does poppet go in a V-6 looper?
It is dumped into the cylinder heads at the t-stat covers. The V-6 looper heads run nearly dry with the only cooling is from the t-stat reliefs and opening of t-stat, thus the reason they are hot to the touch…when poppet opens the excess water is dumped into t-stat covers and helps cool the heads.
What should I do if my engine valve is stuck?
Follow all procedures outlined in repair manual. While the engine is cold, inspect the engine valve to see why it might be sticking. You should check your engine regularly for any signs of wear, like a stuck valve, to keep your car working at it’s best.
