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Questions tagged [small-engine]

Engines used in applications such as lawn mowers, go carts, chain saws, compressors, small pumps, generators, garden tractors, and string trimmers. Frequently hand (pull) started and without an electrical system beyond the spark plug. Technically there is an overlap with motorcycle / scooter engines, but for questions related to motor cycles or scooters those tags are preferred.

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Does pulling a recoil rope when small engine is rotating cause any damage?

Recently, I accidentally released the pull rope of my lawnmower after succesfully starting it. The spring caused it to go past the handle rest on the handlebars, so the pull rope crashed against the ...
juhist's user avatar
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1 vote
1 answer
35 views

Resleeving a small engine?

Can you guys please help me settle a debate with a mechanic friend of mine? He claims that it is possible to keep a small Honda or similar engine running literally for tens of thousands of hours by ...
Justify 's user avatar
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1 answer
29 views

Small engine Problem (Builds Head Pressure that Prevents Rotatation)

The engine of concern is a 224cc CHP OHV small engine (Champion Generator), I can pull the rope and within a few pulls, the engine builds pressure that prevents me from being able to further rotate ...
Albertus Magnus's user avatar
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0 answers
15 views

Engine controls

I have a Kohler 21hp motor on a Husqvarna riding mower engine controls are all messed up for chock and throttle and govner I got it like this don't know what springs are missing and what else is ...
Todd Bernier's user avatar
1 vote
0 answers
91 views

Riding mower won't start -- only sparks when ignition key is released

I'm trying to get my Craftsman DYS-4500 (917276905) working again. New battery, charged and working. New spark plugs. New ignition coils / spark plug wires (x2). A week or two back, I did get the ...
Josh M.'s user avatar
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1 vote
1 answer
171 views

Weed eater dies when idling or not at full throttle, but is near catching fire at full throttle

As the title says, my weed eater dies unless I run it wide open. If I release the throttle, it will die flat out without hesitation. Running it wide open causes it get red hot. It melted part of the ...
JLDN Admin's user avatar
0 votes
1 answer
41 views

Weak spark with OK coil resistances

I am having an odd behavior with a two cylinder honda gx620 engine. There is no spark on both plugs. While not really an uncommon occurrence all my usual checks have yielded no result. I did the ...
Yanick Salzmann's user avatar
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0 answers
47 views

Why won't my chainsaw start?

I have a Stihl something-or-other, and it reliably has the same problem: It will start and run beautifully, then eventually it will no longer start, most likely due to too much oil in the mix, as the ...
user101434's user avatar
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51 views

Lawnmowers , just why?

I was mowing the lawns the other day , I managed to knock the oil cap loose and oil spurted out into the engine block I didn't think it was that much oil so I put the lid back on and kept mowing , the ...
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1 answer
48 views

Is there any ecu(engine control unit)in a 70 cc bike like Honda cd 70?

I know that ecu is there in cars but I am confused is there any ecu(engine control unit) in a 70 cc bike like Honda cd 70?
DSP_CS's user avatar
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I have a new NIBBI racing carburetor for my 212cc

I just bought a new NIBBI carburetor for my 212 cc predator motor and the old one only had one line which was the gas line and this one has three so I’m not sure what to do with them one of the lines ...
Jonas L's user avatar
1 vote
1 answer
66 views

Generator won't start cold - compression release bad?

I bought a brand new generator (an AIPower GXS7100iRD) late last year. From day 1, it was incredibly difficult to start cold. It would require being cranked until the battery was nearly dead before it ...
nsayer's user avatar
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1 answer
784 views

Why Your Lawn Mower Won’t Start After Winter?

What are the most common reasons for a lawn mower not starting after being stored during the winter, and what steps can I take to troubleshoot and fix the issue? I have found the solution for this ...
greeneryguide's user avatar
8 votes
1 answer
696 views

Scraping sound in new small engine

I normally only work with really old engines often abandoned for a long time and in that case typically hearing crunchy or scraping noises when moving the piston is undoubtedly a bad sign and warrant ...
Yanick Salzmann's user avatar
2 votes
0 answers
23 views

Small edger engine - hard to start

I have a small edger 2-stroke that is hard to start. I cleaned plug, washed sponge air filter and it still won’t start. I sprayed starter fluid in air intake and it started. While running I put air ...
jlo-gmail's user avatar
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2 votes
1 answer
103 views

Small engine has gas or propane always turned on - will the fuel leak?

I have a gravity-fed-gas and propane dual-fuel pull-start 4-stroke portable generator which works well and with no problems. I am thinking of adding an add-on remote start so I don't have to go out to ...
Triplefault's user avatar
0 votes
1 answer
2k views

Why is the engine surging in my Craftsman lawn tractor?

How can I stop my lawn tractor engine from surging at low throttle/RPM? I have an 18.5 hp Briggs and Stratton single cylinder. I have re-built the carburetor and adjusted the mixture screw.
XLRick's user avatar
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1 vote
1 answer
4k views

Low Oil Pressure in Cub Cadet ZT1 42" with Kohler 7000

I have a Cub Cadet ZT1 42" zero-turn mower. Last month, just after my mower was two years old, a quart of oil was on my garage floor. The shop I bought it from replaced the transmission under ...
Cofey's user avatar
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1 vote
0 answers
69 views

Purpose of clutch in transmission with multiple neutrals

I am currently repurposing the transmission and clutch of a pretty old walking tractor (Bucher K3). Here is a picture of exactly that transmission: So this transmission has 3 forward and one reverse ...
Yanick Salzmann's user avatar
2 votes
1 answer
248 views

Binding mower motor

I have a mower (or mini tractor) with a Briggs & Stratton 12 HP motor which binds quite a bit, causing it to be difficult to start. I assume that it is either due to rust / missing lubrication / a ...
JoSSte's user avatar
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1 vote
1 answer
76 views

Small engine reliable spark only in wrong direction

I have a very old (date unknown but pre 1980 I think) Motowatt 1500s generator driven by a two stroke MAG motor. When I bought it it had no spark. After cleaning the points there was spark but only at ...
Yanick Salzmann's user avatar
0 votes
1 answer
33 views

Mower won't start

I have a 4 hp Briggs and Straton lawn mower engine that won't start at all. I've changed the spark plug, air filter, carburetor float valve and seat. Gas is also new. Can't even get a sputter out of ...
cookiejorge's user avatar
2 votes
1 answer
46 views

How to inspect and clean a small engine stored for year without oil cap?

I recently discovered my wood chipper's oil filler cap is missing. Assuming it fell off last time I used it, the engine has been uncapped for over a year. Wind often blows dust and leaves into my ...
zwiebelspaetzle's user avatar
1 vote
1 answer
110 views

When should I do the first oil change for a rarely used lawnmower?

I bought a lawnmower that has these oil change service intervals in the engine operating manual: After the first month or after 5 operating hours: change the engine oil Every 6 months or after 50 ...
juhist's user avatar
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1 vote
0 answers
689 views

Tuff Torq Hydrostatic Transmission Troubleshooting

I have a Tuff Torq hydrostatic transmission (model: 7A646084591) that I'm suspicious of, but I can't quite figure out the best way to troubleshoot. I'm looking for a way to determine if: The ...
cam.b's user avatar
  • 21
2 votes
1 answer
105 views

Ariens 911016 mower fuel intake problems

Started up mower this season after sitting all winter with fuel in the tank. Engine will start up for a few seconds very robustly and then sputter out. It was running last season, not perfectly but no ...
Nick Cherry's user avatar
1 vote
2 answers
1k views

2019 Cub Cadet XT1 Riding Lawnmower Under Powered

I have a 2019 Cub Cadet XT1 (model: 13A9A1CS056) that has been experiencing some power loss under load, especially after mowing for a bit (~30m ~ 1h). It struggles to move as fast as when I first got ...
cam.b's user avatar
  • 21
4 votes
1 answer
2k views

Stihl fs 55 string trimmer not idling and blowing out white smoke

I just bought a string trimmer off of Facebook marketplace for 100. The guy that I bought it off of said that he put too much oil in it and that’s why it was blowing out smoke. I got it back home and ...
Brock Neill's user avatar
0 votes
1 answer
56 views

Dimethyl Ether as a fuel for (mostly small) spark-ignited engines

Currently, many small stationary (and some not so stationary) spark ignited engines are sold with the capability of being converted ("on the fly" even) from gasoline operation to operation ...
ThreePhaseEel's user avatar
0 votes
0 answers
37 views

2018 tgb tapo (202) engine turns over but won't fire up

tgb tapo rs 50 I have spark and fuel cock seems to work, iv'e also removed carb and cleaned it wondering if i need to remove inlet manifold and check the reeds
Gaz's user avatar
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0 votes
2 answers
827 views

Honda GX270 engine very high compression

I have a (previously working) Honda GX270 engine that I was transporting in my truck recently. The strap came off and it tumbled in the back. Nothing serious, but it was lying on its side for about 15-...
Yanick Salzmann's user avatar
0 votes
0 answers
262 views

Coleman CT200U EX starts when dies

I initially was putting a new carb on but decided to just keep the stock one. I have put it all back on. But when I started it it instantly when full throttle. So I did some research and learned about ...
Zeus's user avatar
  • 1
2 votes
1 answer
311 views

Power from magneto (for LED)

I've got a lawnmower engine on a hovercraft and I'd like to power the headlight on it without a battery. I understand there isn't an "alternator" per se in these engines, but there's a ...
Brydon Gibson's user avatar
2 votes
2 answers
305 views

Electric motor replaced with Gas engine

I have a vacuum that that currently powered by a 3 phase 5 HP electric motor. Currently I cannot power this vacuum with a generator, I would like to convert this vacuum to a gas engine instead. I know ...
Travis Pettry's user avatar
0 votes
1 answer
40 views

Poulan chain saw

How do I install a new piston with 21 loose needle bearings around the wrist pin in the little end of the connecting rod? I have tried to install the wrist pin but the needle bearings keep falling ...
willie's user avatar
  • 1
0 votes
1 answer
802 views

Two stroke engine with unreliable idle

I am currently restoring a Partner 22 GBI leaf blower and facing some weird issues. I have removed the carb, cleaned it in the ultrasonic and restored everything to factory settings. After running ...
Yanick Salzmann's user avatar
0 votes
0 answers
136 views

Does a new small-engine carb need to be adjusted?

(Stihl FS55 string trimmer) After years of regular use, the engine degraded fairly suddenly to barely keeping alive, uselessly low power, and running very rich. For reasons good or not, I decided to ...
George's user avatar
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1 vote
1 answer
212 views

Do few pull starts with fuel and ignition off cover the cylinder in oil in a splash lubricated small engine?

Some 1-cylinder small engines have instructions that before long-term storage you should take off the spark plug, pour few milliliters of oil into the cylinder, and very slowly pull the starter cord (...
juhist's user avatar
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1 vote
1 answer
4k views

Throttle Linkage for Kohler Command 18 Engine in Cub Cadet 2186

I pulled apart my engine and now can not figure out how to connect my engine controls. Update: I did eventually get the bushing (#22) and rod (#23) to fit in the large hole by putting the bushing in ...
James Valeii's user avatar
0 votes
1 answer
260 views

White outdoor riding mower wont start

Mower was running let sit for 2 months so I drained the gas took bowls off carbs cleaned everything .still won't start unless I spray carbs acts like not getting gas
Tom's user avatar
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1 vote
2 answers
318 views

How do splash lubricated horizontal crankshaft engines lubricate the valve mechanism?

In many small engines, splash lubrication is used unlike in cars which always have an oil pump. I understand that when the small engine is a vertical crankshaft one like in lawnmowers, where the ...
juhist's user avatar
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6 votes
1 answer
582 views

Small engine air return to gas tank

I've got a gasoline powered generator - it was dying after running for a while, and I've finally figured out it's because the engine is starving itself of gas. If I slightly open the fuel cap, I can ...
Brydon Gibson's user avatar
1 vote
0 answers
596 views

What causes a puff of white smoke every time starting a cold lawnmower?

I have a new lawnmower that seems to make a puff of white smoke every time I start a cold engine. It doesn't make any smoke when starting a warm engine or during operation of a warm engine, and has no ...
juhist's user avatar
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2 votes
0 answers
70 views

Finding rig gap specifications of old engine

I am currently restoring an old Briggs & Stratton engine. I found that it burns a little bit of oil and also saw that the head was oily after removal. I removed the piston and checked the ring gap ...
Yanick Salzmann's user avatar
5 votes
1 answer
1k views

Why does my lawnmower air filter have a metal wire mesh?

I bought two spare paper air filters for my lawnmower. Once they arrived, I noticed an interesting feature in them. The side of the air filter that is at the carburetor/engine side has a thick metal ...
juhist's user avatar
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0 votes
1 answer
2k views

Engine for Briggs & Stratton mower not starting. Might be flooded

My Briggs and Stratton mower won’t start. Only used it twice. I may have over filled the gas tank and flooded it. Not sure. Gas is leaking from the air filter.
Jim's user avatar
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0 votes
1 answer
82 views

1996 40hp mariner magnum - no start

The above mentioned motor is new to me. Since it was new to me and I couldn’t be sure if the oil injector was working, I mixed 10 liters fuel 50:1 so I could see if it was consuming oil. After ...
Oldoldhouseguy's user avatar
0 votes
0 answers
5k views

Carburetor not drawing fuel from tank

So the title is kind of generic, but I am facing a bit of a weird situation. I am going to explain it first, but I also have some pictures at the end that might help. I have bought a cheap 2 stroke ...
Yanick Salzmann's user avatar
0 votes
4 answers
221 views

Does a carburetor have constant fuel mass flow, constant liquid volume flow, or constant molecule count flow?

I have a generator with carburetor. It seems to consume a bit more fuel than I expected, 0.44 liters per hour for 386 watt production, or 1.14 liters per kWh. I'm also bit more annoyed by the exhaust ...
juhist's user avatar
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2 votes
1 answer
690 views

Replacing Briggs and Stratton small engine on Troy Bilt Horse

I have an old Troy Bilt Horse tiller, model 12090 with a 8hp Briggs Industrial Plus 196437, type 013401, code 9612181A. I bought a direct replacement engine, Briggs 19N137-0084 (https://www....
biostatrat's user avatar