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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32 views

Purpose and correct name of plastic inserts in 2-stroke cylinder

I recently replaced the cylinder and piston on a broken chainsaw 2-stroke engine and I found 2 plastic inserts inside the cylinder. I'm wondering what purpose these serve, and what the correct name ...
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17 views

Is back-pressure (or air-intake suction) of ANY value to a typical little(20-->50cc) 2-stroke engine? Like chainsaws, blowers etc [duplicate]

Have been searching for this answer for a while, typically I look for an answer & give-up when nobody can provide one but this time I'm going to learn the truth!! For chainsaws, weed-eaters etc, ...
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48 views

Lawnmower locked up, cannot turn shaft

Thank you for coming here. My dad recently picked up a Craftsman gcv 160 mower. When I unloaded it, I ran it for a while, then drained the oil. Remember, it worked when I got it. The oil was very ...
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52 views

CC per HP in a 2-stroke engine?

I have a bunch of 2-stroke engines and the websites that I found only tell me about 4-cycle engines. Do you happen to know the ratio of cc to HP?
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1answer
39 views

Exhaust back-pressure Q on simple 2-stroke yard-equipment engines:

I am having trouble getting a precise answer- is back-pressure necessary on a little single-cylinder 40cc 2-stroke like a chainsaw or a blower? I ask because people frequently modify mufflers to ...
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1answer
51 views

My Coleman CT200U, has white smoke and what seems to be oil coming out of the exhaust ,

My Coleman CT200U, has white smoke and what seems to be oil coming out of the exhaust , would this be a piston ring issue ?
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1answer
32 views

How would you go about putting a Huyabusa engine in a Deawoo Matiz?

My first car was a Deawoo Matiz. I have a real fondness for the little car and always thought if it just had a bit more power it would be great. My question is how would you go about doing this? You ...
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2k views

Can I use a gasket maker instead of a gasket for a lawn mower engine?

Is it okay to use a gasket maker instead of a gasket? No this is not going in a car it is for a lawnmower/small engines.
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38 views

What would cause a weed-eater to suddenly only run on partial choke?

As stated in question - was starting and running beautifully until this past usage. Same fuel I've been using and same storage method. Suddenly will only run on mid-choke. Even after using for 10 ...
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1answer
88 views

B&S push mower starts and stalls after refueling

I've very recently had some trouble with a push mower I bought last fall. A couple weeks ago, the engine died a couple minutes after I started mowing. Turns out it was out of gas, so I refilled it. ...
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204 views

What closes the throttle on a Honda GX120?

I've a problem with a GX120 in that I start it and it just revs up to maximum rpm and stays that way. The throttle butterfly is linked to the governor arm via the usual arrangement (weak spring plus ...
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1answer
1k views

What can be the reason for rough idle after engine oil change on petrol cars?

I own a L12B Honda Fit/Jazz. I have never felt roughness at idle during my 6 months of ownership. I had oil change yesterday where they drained and filled Honda Recommended Synthetic Oil. My ideal ...
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1answer
52 views

Will it ruin a blower's future-adjustments to do the 'H & L screw-hack'?

These 2-strokes have H & L adjustments on the carbs but often have limiters built in and commonly people just hack a line across them to adjust with a flat-head, I'm tempted to do this but, at the ...
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26 views

What is the exact name of this RC nitro engine specific carburator part?

I've a Traxxas Pro .15 engine with me. The rubber boot attached to "Throttle lever" on my carburetor is cracked (picture given below). The engine has been in storage for the last one year. Yesterday ...
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2answers
34 views

My like-new chainsaw is stalling-out in a very weird way, hoping to know if I should try adjusting Idle or L-adjustment first?

It's stalling-out when idled, it'll let me use it pretty indefinitely it seems. I've got other 2-strokes that bog-down and stall-out when idling (opening the choke a little usually keeps them going, ...
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9 views

chainsaws&blowers: Any guides/instructions on installing DIY air pre-filters on units with weak OEM filters?

I really love the idea (in link below) of Echo's 'pre-filter' setup to ease/assist the actual/main air filter and would love to DIY something, am guessing a stiff-enough, heat tolerant mesh material ...
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1answer
50 views

This seemed a good spot for engine-stuff, so: What are some ways that *may* lead to greater power in a chainsaw?

This seemed the best area to ask since it's not a tool question so much as an engine question, I use a high-end premade fuel and always have a sharp or sharp-ish chain, am just hoping to learn the ...
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5answers
2k views

2 Stroke engine magneto ignition system

I've got a 2 stroke 1 cylinder engine and its ignition system doesn't seem to work. I'm having problems with my magneto ignition system and I need help connecting everything up. I think I've ...
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1answer
29 views

White outdoor lawn tractor issue

I have a White Outdoor lawn tractor with Tecumseh engine. I have the following issues and need to find the culprit: Heavy white smoke Oil smell gas There's oil under the air filter and it's leaking ...
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1answer
913 views

50cc Scooter only runs when manually choking air intake

I bought a 50cc Yamaha Zuma off of craigslist, and it's had some aftermarket parts put on it (exhaust, 70cc big bore kit, new carb). I cleaned the carb and converted the throttle to a one cable set-up ...
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2answers
49 views

Using SAE 10W-30 in both Vehicle and Lawnmower

I have a Toyota vehicle with the 1MZFE engine, and have purchased SAE 10W-30 engine oil to put in this car. My question is this: Is there a problem with putting this kind of oil in my Troy-Bilt ...
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307 views

carburetor Leaking gas oil mix when fuel lines replaced

Disclaimer I know this is for a blower not an engine, but was not sure where exactly to pose the ? I'm trying to assemble the fuel lines for the Ryobi BP42 two cycle blower, someone else took it ...
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1answer
18 views

New carburator gas coming out of small tube inside

I installed a new carburator on a 6.5 hp Tecumseh motor for a wood chipper. After hooking the fuel line back, gas flows steadily out of the small tube inside the carb. I am not very mechanically ...
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31 views

Honda GX620 Engine not running on LPG

Okay it's not a car, it's in a generator, but I couldn't find anywhere better to ask. I've got an GX620 Honda V-TWIN it runs fine on petrol but won't run on lpg, it's meant to be dual fuel. If I ...
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2answers
4k views

Using 10w-30 instead of 5w-30 engine oil

My car is Suzuki alto japan 2017. According to the owner's manual, car manufacturer recommends 0w-20 or 5W-30 engine oil. But the previous owner has used 10w-30 oil. The average temperature of the ...
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1answer
88 views

Snowblower is hard to pull in cold

I have a pull start blower from sometime in the 90’s. It’s a beast! However, I need to put a heater on it for about 10 minutes so I can reasonably pull it. Otherwise, it’s super difficult to pull ...
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1answer
809 views

Briggs and Stratton “Just Check and Add, never change oil” engine

Recently a relative was bragging about their new mower, with a new Briggs and Stratton "Just Check and Add" engine, with no oil change recommendation. Better than sliced bread. I remember when a ...
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22 views

1987 skidoo elan carb issues

I am trying to figure out either what model carb I have (to purchase a rebuild kit) or spec settings on the fuel/air jets. Tried to start her up tonight, ran for a minute then got flooded. Anything ...
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20 views

Trimmer has suddenly stopped starting

It's a Poulan Pro P1500 trimmer. Carburettor was changed recently and has been cleaned. Fuel can be seen on the spark plug once it is removed. Inline spark plug tester shows that ignition coil is ...
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1answer
51 views

Lack of compression after adjusting intake valve

I was recently tuning my 4 stroke lawn mower to shoot flames. I messed around with the intake valve, and soon found big flames coming out my exhaust. How ever the next day there was no compression and ...
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27 views

Four cycle engine with oil in gas. What should I do besides new spark plug?

Honda GC160 5.0 emits thick blue smoke. I used it several days when it came to a stop. Filled the tank with fresh (no mix) gas & it would not start. Bought & changed the old spark plug. After ...
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22 views

Oil viscosity question

I recently made the mistake of over-filling my ride on lawn mower/Briggs & Strattan motor. Damage to the motor is done now and it's blowing heaps of smoke and fowling the spark plug. Question: Can ...
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6k views

Two stroke engine dies at full throttle

I've got a two stroke strimmer (new last summer). It starts fine and responds smoothly to the throttle but approaching full throttle it cuts out. I've tried changing the fuel for carefully measured ...
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2answers
871 views

White smoke from Husqvarna 128DJX trimmer

I'm working on a Husqvarna 128DJX for my dad that's smoking while under load. At idle, there is no visible smoke. At half throttle, you see white smoke, and at full throttle, you really see it. On top ...
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1answer
565 views

briggs stratton 16 hp ic single cylinder

I have a Lincoln welder with a 16 hp briggs Stratton engine that will only run with the choke closed. what could cause this?
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1answer
4k views

String trimmer revving too high at WOT?

Someone gave me a 52cc string trimmer for free because they say it wasn't working. We would only get it started by dropping a few drops of fuel into the cylinder, and it would idle quite high for a ...
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2answers
192 views

Tecumseh Yard Machine (156cc) does not start and there's no combustion: Does this sound like an ignition coil issue?

I recently picked up a small mower on craigslist as a fun side-project, but I have had only a little experience with small engines, and limited limited funds for troubleshooting. Could someone give ...
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0answers
72 views

Do you need this lawnmower part and what does it do?

I have a craftsman riding lawnmower model 247.203744 I started it up and heard a sound that made a kind of plastic getting broken sound... which it was. There is a black disk inside the engine ...
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3answers
7k views

Help please! Loud clicking/ knocking sound coming from engine

I really appreciate anyones time. I own a 2003 Pontiac Sunfire 5-speed manual with the 2.2L l850 Gm engine with about 320,XXX kilometres for reference. Anyways, so I went drifting last night and did ...
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28 views

Engine/model information for lawnmower

I need a riding mower. I am low on dollars and my neighbour has a year-old John Deere that needs an engine. What do I need to know about the motor to search for one? Where do I search? And would it be ...
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0answers
90 views

Weed Wacker Not Running Properly

I have a Remington weed wacker that is ~2 years old. It worked great for the first 2 or 3 months but then I could not get it to work properly. I have tried new gas, new plug, adjusting the idle on ...
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2answers
3k views

Lawn Mower Motor Troubleshooting - No Spark?

I filled up my lawnmower from a gas can earlier today and spent about 15 minutes trying to pull start it. I've checked the oil level and color and both seem fine to my inexpert eye. On two separate ...
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0answers
42 views

Nitro R/C buggy starts then engine quits

I have a nitro remote-controlled nb16 buggy. When I put the glowstarter in the engine and start the engine and remove the glowstarter everything runs fine. However, once I press the accelerator on ...
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0answers
127 views

Carb adjustment on carb where L and H aren't marked

I'm working on a string trimmer currently whose adjustment screws are not labeled - or the labels have worn off with time. :) For reference, the carb is a Zama. It seems to me that there is a ...
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2answers
1k views

Keep control cables from freezing on snowblower

Context: I have a Husqvarna 1830HV snowblower. The chute is controlled by steel cables a lot like bike brake cables. They work almost exactly like bike brake cables, in fact, except for the fact ...
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2answers
829 views

Briggs & Stratton 7.5 hp wood chipper loses power after an hour of runtime

My Sears woodchipper with a 7.5 HP Briggs & Stratton engine cranks up great even after sitting for months (I use gas stabilizer). Then it works fine for about an hour...then starts losing power/...
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1answer
42 views

Reliable budget small diesel car - around 4-7 years old [closed]

I'm looking to buy a small budget diesel car in the UK I was wondering what are some reliable suggestions. I have a D4D Yaris at the moment that is playing up. I have been looking at the Hyundai I20, ...
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1answer
7k views

Lawn tractor, difficulty starting in cold weather

I have a Troy Bilt Bronco riding tractor, about 6 years young, with a Kohler Courage 20 (19hp) engine that is extremely difficult to start in temperatures below 40F. This is a persistent problem. ...
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1answer
698 views

Is it OK to run a trimmer without the plate-filter support?

I've discovered the answer to this question by unfortunate experience, so I'm sharing it... I have an XT200 Weedeater Trimmer. In between the carburetor and the air filter is a thin metal plate ...
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1answer
860 views

Why is there a power loss in my small engine motorcycle at a certain RPM range?

I own a TVS Apache RTR 160 (a single cylinder, air-cooled, carburetor motorcycle.) with close to 35000 kilometers. The bikes loses power in 2nd and higher gears, between 5-6.5k RPM. It loses power ...