Question about Troy Bilt, Tuffy, Rear - Tine Tiller, 4.0 Tecumseh Engine

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I have an old pressure washer that uses Tecumseh H30 engine. After pumping the choke bulb on the carb, it will crank, run maybe 5 seconds and quit. Thanks

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When you get it started, move the choke to the middle, then let it warm up. you might have to move the choke back and forth until it warms up, keep the throttle wide open.

Posted on Jul 04, 2009

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How do you start the dcs642120


Put fresh fuel/oil 50:1 mix in the fuel tank. Turn on ignition, set fast idle and full choke. Prime the carb, if it has a pump bulb for that.

Holding saw so it can't move at you, pull the starter smartly for at most 5 times or until it "pops". If it pops, take choke off and pull starter until it starts.
Else, take choke off and crank it maybe 5 times until it runs, or go to full choke again for maybe 3 cranks.
Keep alternating sets of pulls with/without full choke until you get a pop, or give up. All the above is for the general case- shouldn't take many cranks for modern saws to get one running.

Pay attention for safety to how you hold the saw, like maybe with the rear of the rear handle located inside your right knee.

Nov 07, 2015 | Makita Garden

1 Answer

Tecumseh engine wtpxs.1851ba. starts and runs 15 seconds then quits. I can keep it running with my thumb over the carb like full choke. I have rebuilt carb but still runs only 15 seconds. What else could...


In the process of the rebuild you must also replace the primer bulb. There is most likely a pin hole in the primer bulb item 35 this link:
http://www.partstree.com/parts/?lc=tecumseh&mn=TEC-640174&dn=CASERIES_211640174-CA

Also make sure that the orifice in item 36 is clear. You should be able to see a pin hole of light throught this tube.

With the loat bowl removed you should have enough gas flow to fill a spray paint can lid in 10 - 15 seconds. If you do not have this kind of fuel flow... inspect the gas lines and tank. Also make sure there is no debris in the float needle seat. Item 30 of above link.

Thanks for choosing FixYa,
Kelly

Jun 12, 2011 | Saito Engines Carb. Body Assmo,bb,cc,gg...

2 Answers

Our HMSK 80-110 electric start snowblower starts up right away, but the idling is very rough. It runs very smoothly when it is engaged in snow throwing.


The Tecumseh snow motors are notorious for idling rough. Especially the last few years of production. Most service techs just say "live with it" But there are a couple of things you can do to help.
It is not a carb adjustment issue. It's usually a fuel, clean carb issue.
First, use a premium grade fuel without ethanol and a fuel stabilizer. This will give you the best fuel mix.
Second, Remove the carburetor shield and clean the inside and outside of the carb with carb cleaner. Even though you can't see the carb usually, they do get varnish build up and cleaning it will help some.
Third, Put the recommended amount of fuel system cleaner in the gas. I use Sea Foam brand. Over a tank full or two you will notice a difference in how the engine idles.
Fourth, Use a high quality spark plug and use a new one every year. Make sure the gap is correct.
Good Luck! Feel free to as any other questions you may have. Don't forget to rate this answer!

Jan 14, 2011 | Tecumseh Horizontal Tiller Engine 8 Hp, 1"...

1 Answer

Engine starts fine but lacks power until it warms up for 2 to 5 minutes. Carb is ok, replaced head gasket. Just started doing this


If it starts at completely cold to fine tune the high jet adjustment.first off the high speed jet should be initially set at 1 1/2 turns out from lightly bottomed all the way in. next when you do your prestart routine,choke all the way on,primer pumped two times,throttle set at the high speed position,ignition key on,fuel line turned on.(this is my prestartup for my 8hp tecumseh)yours may be slightly different.use whatever starts your machine the easiest! once my machine starts up i can almost immediately turn the choke completely off. i can do that because the high speed jet is opened enough or rich enough for the engine to run.if you adjust the high speed in it will lean the motor out(you found that to be true!) to where it will miss and backfire and eventually quit. start at 1 1/2 turns out and start the engine,once the engine starts if you take the choke off right away use what it does as a guide to high speed adjustment. if the engine quits turn the screw out 1/4 turn and so on.use the very first cold startup as the test for high speed mixture adjustment. at completely cold startup you have the jet adjusted correctly when the engine will sustain itself when you completely take the choke off very shortly after startup. let the amount of choke you need at cold start to keep the engine running be your guide.too lean and the engine will not stay running without the choke at all,too rich and the engine will not pull under extreme loads and will show signs of black soot out the exhaust. you want the jet adjusted so within 5 seconds of cold start the engine will stay running with no choke at all. find that needle setting ( don't ad any more!! ) and you'll be good to go.keep in mind the above is not optimum and is a little rich but you will like the way it starts,stays running,and overall performs as adjusted above.

Oct 03, 2010 | Tecumseh 5hp Engine Snow King Mtd Blowers...

2 Answers

I have a firefighting pump with a honda engine it


above the startercord there are 2 handles. top one is grey is choke , bottom is black, is fuel tap. first open fuel tap put on choke, start, after 5 or 10 seconds put choke off. if its not starting on choke, gets no fuel. under fueltap is chamber with 10 mil bolt. open and clean. also drain or take off floaterchamber of carb. this is the round cup under the carb. good luck.

Feb 12, 2010 | Honda 8 HP Engine

2 Answers

I have a vm80 8hp tecumseh engine 150092D day


If you want a 'drop-in' replacement, you will HAVE to source a carb that was fitted as original equipment. Following the demise of Tecumseh's engine division, supply is limited to 'old stock', but there is fair spares aqvailability at present. A newer 'primer start' carb will fit, but you will have to remove all the choke operating mechanism. Don't fit a carb from a larger or smaller engine - the mixture will be wrong, and the engine will never run properly.

Sep 25, 2009 | Garden

1 Answer

Runs for 5 seconds with choke pulled;no crank without choke


check your fuel pump to see if working,, then clean or replace carb,, and do tune up on it,,, hope this help you,, good luck

Aug 12, 2009 | Husqvarna Lawn Tractor - 54in. Deck, 26...

3 Answers

Tecumseh Snow King HS40 engine only runs on full choke, no power


i did and thanks - just picked up one that does the same thing and i plan to take your advise

Thank you Jerr

Jan 01, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

Unable to start gas engine on a NorthStar pressure washer


Disassemble and clean the carb. If it ran briefly with the starer fluid then gasoline is not coming through the carb.

Dec 30, 2008 | Northstar Garden

1 Answer

2000 Oldsmobile Bravada


Please stop using the starting fluid, it is terrible for your engine- use choke cleaner if you need to do this in the future again. you can run it on choke cleaner indefinately if needed.
It sounds like your fuel pump quit on ya. When you turn the key to the "run" position do you hear the pump run in the tank for 3-5 seconds? you should. The fuel pump is in the gas tank and the tank has to be removed to acess it.
you can remove the coil wire from the coil and check to see if the coil is firing a spark. crank the engine with the wire off. make sure there is no starting fluid or choke cleaner fumes around before you do this-k? Carefull not to let it shock you. if it is sparking then you should check the fuel pressure. it should be 60psi while cranking the engine. you will need a fuel pressure guage to do this.
Good luck........Scott

Sep 21, 2008 | 2000 Oldsmobile Bravada

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