Question about Briggs & Stratton Briggs Stratton Vanguard V - Twin Vertical Ohv Engine with Electric Start 23 Hp, 1" X 3 5/32" Shaft, ModelNo. 386777 - 0036 - E1

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Engine won't stay running

I actually have the smaller 17.5 hp single-cylinder version of this motor. It's mounted to a lawn tractor (Troy). Was cutting grass and engine just died. Checked all the usual, spark, fuel, compression. Spark is good and strong, compression is fine, fuel getting to carb. What I think is the problem relates to what looks like a small solenoid on the bottom of the float bowl with a 2-wire plug attached to it. I suspect that this is some kind of low-oil shutdown circuit. Checked oil level, and oil it is full.

Engine will start if fuel is poured into carb, but will not stay running. Tried disconnecting plug from solenoid, but still doesn't start. Seems no fuel is getting to engine, as the plug is dry.

Thoughts on how to troubleshoot this thing further? How does that circuit work? It looks like one wire is just a ground going to the block. I guess the sensor could have failed or possibly the oil pump (do these things have oil pumps?) went.

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Check the fuses which are under the seat
Also it will not run unless the parking brake is set when your not setting on the seat

Posted on May 02, 2010

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The carburetor solenoid has nothing to do with the low-oil-pressure-switch (which kills the ignition when it has low pressure oil). The solenoid requires power from the battery through the ignition switch to open the main jet that it plugs when off. If the solenoid has two wires, one goes to the battery and the other to ground. Testing is simple--turn on the ignition and check for 12 volts across the solenoid connectors. If it has voltage, the solenoid may be open circuited (new solenoid), or the plunger inside of it is stuck in the plug-jet position (which may be cleanable). Hope this helps!

Posted on Jun 07, 2010

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This 25 hp engine has 3 different possible alternators, standard circuit, dual circuit, tri-circuit. I would need the exact engine model numbers in order to precisely answer your question. Often mower models have choices for the engine they come with. In this situation the engine model is more important than the model of the mower.

Testing an alternator is fairly simple; all you need is a multimeter for testing.
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  3. Attach RED test lead to either pin on stator side of stator connector. (On single wire leads, attach RED test lead to the single pin.)
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B. In the picture is a two wire stator connector.
25576096-4l1urzt5ysxbk0em2umcwdes-5-3.jpg

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I have a 16 HP Troy with 42 inch deck driven through a electric clutch. I also have a "grass pump" on my deck. Important maintenance tips: Keep the bearings greased, keep the deck clean underneath. The belt on the deck should have the tensioner released when you are NOT mowing. Keep the blades sharp and in good repair. Mow with engine at full speed. When you get to areas of heavy growth, slow the tractor down (hydro drive) or reduce to a lower gear (gear drive). NEVER adjust speed using the "clutch" (hydro drive or gear drive). When you engage the blades (electric or manual) always have the engine just above idle, bring the engine speed up slowly to preserve the belts and reduce stress on all components.

I am sure this is the fix for your trouble. If there is anything else or if I missed the ball, please let me know and we will go further.

Thanks for your question @ FixYa.com

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Canaballing parts


Hello tim38663:

Depending on the Engine Model and Spec this Tecumseh Usually has the Same External Parts as a 15 HP to the 18 HP Single Cylinder Tecumseh Engines.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

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