35 Vangaurd Wants to Then Starts Back Up Again

lax

I have never seen a thermal cutout switch on a Briggs Vanguard motor mounted on a MM frame, I have seen a anti-dorsum burn valve on the carburetor and a low oil force per unit area switch tho.

If this thermal switch does be it should cut the ignition instantly when the engine overheats, not a spit and sputter.

hardcorehunter

Had the same problem on a 23 vanguard get devil.It would start up idle and accept off only quick as y'all put a load on it it spit n sputtered.Cheque your gas.I got some water in my gas and it plugged upwards all the jets in my carbs.I took it to two different shops before they got it correct. The problem was they thought they had it fixed because when they started it shed idle and open up ok but when you lot put a load on it she quit.They werent putting the motor in the water at the store.It ended upwards costing me around 600 bucks by the fourth dimension information technology was all over.Another thing to gas doesnt have the shelf life information technology use to.The guy who stock-still mine told me if you lot dont run the whole tank of gas in 1 month put fuel stabilizer in it.Gas present turns to varnish afterwards time and really gums up your carbs.And so next time yous put your gunkhole up unhook the fuel line and let it run out.That way your certain theres no gas in the carbs to get stale.

tanner-bull-sprig

I have never seen a thermal cutout switch on a Briggs Vanguard motor mounted on a MM frame, I take seen a anti-back fire valve on the carburetor and a low oil pressure switch tho.
If this thermal switch does be it should cut the ignition instantly when the engine overheats, not a spit and sputter.

Ding, Ding, Ding.

You take gotten more communication about this than I could ever sift through. I can tell you that the symptoms yous describe are identical to what happened to me this by winter.

The engine would run fine until information technology was under a load for several minutes or even seconds, and then information technology would spit and sputter. These engines utilize diaphram fuel pumps, and the more the carb sucks the fuel, the more the diaphram pumps. This is all good and well, until ane of two things happens.

1. Leak in fuel line somewhere, causing a loss of siphoning action.
ii. Obtruction to fuel flow, (ie: clogged filter, line, or jets)

In my case, the filter allowed just enough fuel through to run the engine for several seconds under a load, (or indefinately under no load or idle), but when the engine was needing the extra fuel, the fuel pump was unable to deliver the appropriate amount due to the obtructing fuel filter media. Then information technology would sputter. When I let off the throttle, she would die. She would start back up, and run once again for awile then the same affair happened over again.

This may or may not be your trouble, but changing the filter along with checking fuel line connections wont hurt or cost much.

Proficient luck.

TBS

tanner-bull-sprig

I forgot to inquire this:

How is information technology possible for the engine to "overheat" when only running for a few seconds? Doesn't seem like an aircooled motor would get that hot in only a few seconds.

I don't know, just curious. Anyone?

TBS

fedman

Vent open up on the gas tank?

stumpgrinder

When information technology starts to sputter can y'all pump da bulb and keep it going? yous said you had an inline filter... an easy way to narrow your problem down is to run it until it dies and when it's starts to sputter just look at your filter to see if there's any fuel left in information technology...

No more than fuel in da filter = an air leak or obstacle upstream

Plenty fuel in da filter = somethin' else

Adept luck! :tu

bbb

After sitting on an oyster bar for 6 hours, I can tell you a couple new things.

A month ago when this 1st happened, I ran near a mile from the ramp before information technology shut down. I choked the motor and information technology would plough over only non start. I went to pump the bulb and it was very tight. I figured it must be a fuel result and disconnected the fuel hose from the carb to release the pressure off the bulb. I opened the carb up and checked to make certain the float was not stuck closed. The carb was total of fuel and so the bladder had cut off the fuel supply. I emptied the carb of the fuel and put everything back together....pumped the bulb and the fuel started flowing into the carb and the bulb got tight once more. Tried to crank the motor.....nothing. I continued to tinker with the motor for a few hours and never got information technology to first again. The next day I took it to the minor engine repair store and it cranked right up and idled for maybe a infinitesimal before we shut it downwardly and I assumed all was well considering last I tried I couldn't get information technology to crank upward at all.

And then this weekend information technology shut down subsequently a 200 yard idle and a 500 yard run. Afterward angling for a few hours using the trolling motor I thought I'd give information technology a whirl and try to fire it up again instead of trolling back to the ramp. It fired right up and I idled most 400 yards before it started spitting and sputtering once again and close off.

Final night I went to the house to crank the motor upwardly and the battery was dead so I couldn't troubleshoot at all. Possibly this night.

DANNY NEWELL

I had a similiar problem last year correct before season.To make a long story short,information technology turned out to be the ing coils.It would run good until you close it off
warm.And then it would peradventure run at an idle and cut out or die.If you allow the
motor cool down[couple hours]it would run fine until it heated upwardly again.
I checked everthing[fuel line,filter,plugs].The local Briggs dealer couldn,t
figure information technology out.It would run out of the water at idle and full throttle and never
missed a lick.It only acted up when y'all put the motor nether a load[in the
water].This was a 23 Vanguard.I had this same problem on an outboard
several years ago,and so I had them change the coils.Trouble solved.The dealer
had no way to bank check the coils without putting the matter under a load.

DANNY

HaydenHunter

I sell construction equipment that uses Honda engines and they have a depression oil sensor. Through this and other boards I take come to understand that Briggs does also.

I get many calls nigh the Honda problems that are usually due to oil alarm and the post-obit conditions.

1) Motor is existence run at an extreme angle, fooling the oil alert sensor into thinking oil is low.
two) Motors consume oil as they run and if not topped off regularly will reach the bespeak of low oil quicker than yous call back.
3) Dirty oil will fool the sensor, perhaps gumming information technology upwards permanently.
4) An engine that is depression on oil will sometimes initially spark upward as there is plenty oil in the sump until the running motor draws up enough oil to kick off the sensor.
5) On a Honda, yous tin temporarily disable the oil alert by pulling the external wire connection. If the motor runs and touching the connection dorsum together kills the motor, you have an oil alert outcome (acquired by either low oil or bad sensor). I wonder if the Briggs can exist similarly tested?

The moral of the story (who'd a thunk it?) is that a crankcase properly filled with make clean oil will eliminate 99% of oil alert issues and motor stalling due to same.

35 Vangaurd Wants to Then Starts Back Up Again

31 Vanguard shutting off after warming up.

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