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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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....
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2 votes
1 answer
53 views

How harmful is it to not put oil in spark plug hole of a stored small engine?

I have a small engine inverter generator. This generator is to be used during power outages which happen rarely where I live, and also tested shortly every 2 years (the testing is also to keep the ...
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4 answers
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How many minutes to wait after turning off small air-cooled engine before oil change?

I am breaking in an inverter generator with small air-cooled 80cc 4-stroke single cylinder engine. After the break-in, I will change the supplied mineral oil to a high-quality fully synthetic oil. My ...
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4 votes
1 answer
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If I start a previously unfueled small engine, do I keep choke on for first pull only or until it starts?

I purchased a small engine inverter generator. It obviously has a carburetor and a choke valve. I just put in the oil and oiled the foam air filter element and am ready to break in the generator with ...
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2 votes
1 answer
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Normally-high run switch vs coil-ground out to turn off

I'm restoring a 1958 larson Playboy - it looks like it originally came with an evinrude engine as there was an evinrude starter solenoid box in the back. This was cabled into the main key which has ...
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3 votes
1 answer
67 views

How do I find a replacement clutch and brake assembly for my chainsaw?

I don't know anything about technical specifications for chainsaw clutches. I'm not asking for shopping advice, but I don't know how to determine which parts are compatible. Last year I bought an ...
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My Kohler Courage mower runs and starts good most of the time

This motor starts good most of the time. But in the last couple years. It like stops up against a compression stroke and won't turn over. I have to turn the crank a little and it will start right up. ...
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1 vote
1 answer
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Is it possible to swap the carburetor of a Briggs & Stratton 5hp?

I want to use a 5hp Briggs & Stratton engine for a kart project. That engine is based on a carburetor that is above the fuel tank, pumping the fuel thanks to the diaphragm. I am thinking about ...
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1 vote
2 answers
132 views

Lawn mower won't start after replacing spark plug, oil, air filter, and carburetor

I have a Toro Recycler, which came with the house when I bought it. The house was purchased in 2016 and I'm going to guess the lawn mower was purchased in the 2012-2013 range. The mower turns but won'...
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2 votes
1 answer
50 views

John Deere E180 makes buzzing noise, but won't start

1: Where can I get a good block diagram / labeled picture showing the parts of the engine. I'm disinclined to pay anything for this, it seems like something JD should be distributing for free. I ...
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wrong spark plug in slow plower - stuck cylinder?

I used a wrong spark plug for my Murray 8HP snow plower. When I pulled the string to start the plower it got stuck. I am afraid it might have damaged the cylinder. Appreciate any suggestions to safely ...
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2 votes
1 answer
55 views

Gasoline glow engine mechanics

I own a wide array of model engines. Typically those engines are either glow engines using nitro fuel, spark engines using gasoline or "diesel" engines using "kerosene". However I ...
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1 vote
1 answer
77 views

Wire hanging loose on B&S small engine - is that normal?

I have a relatively new Briggs & Stratton engine on a Cyclone Rake leaf vacuum. Engine model is 130G32-0184-F1. It's been running fine for several weeks. Today it will not start. I hear no sound ...
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2 votes
2 answers
36 views

New garden motor seizing up

I have a garden tool (roto tiller) with a 196cc engine. The engine is cooled using forced air, it is a 4 stroke engine. The engine has not been used for more than 2-3 hours so far. I have tried to use ...
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1 vote
0 answers
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True/False - For small 2-stroke powertool engines (chainsaws etc), the muffler is inherently restricting power [closed]

Title should be clear but I cannot get a straight answer so hoping you guys&gals can help, I am talking about the "standard" type of small 40-100cc handheld internal combustion 2-stroke ...
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2 votes
1 answer
78 views

Ride-On Mower only cranking once when starting

I have a Husqvarna TS 242 with a Briggs and Stratton 40N877-0016-G1 engine that I'm having some trouble with. My suspicion is something with the electricals - here's what I'm seeing. After a few weeks ...
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2 answers
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Poulan Pro leaf blower engine not sealed, and threads are broken, how can i fix this

I've been trying to get a Poulan Pro leaf blower engine to run. I had noticed that the seal for the engine isn't tight and I saw that the threads were stripped. I know compression is needed for ...
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0 votes
1 answer
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Lawnmower Engine (Should the spark plug hole expel a black residue?)

Been working on a small lawnmower engine. Put away working, it is now the middle of winter. Normally very easy to start, got it to run once a few days ago (very hard start) then never since. It will ...
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2 votes
1 answer
164 views

Chainsaw chain spins after start until I hit the throttle

Immediately after I start my chainsaw (Craftsman 358.350280), without holding the throttle, the chain moves fast. As soon as I press and release the throttle, it comes down to idle fine and the chain ...
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0 votes
1 answer
299 views

Wood chipper engine won't start after being turned on side

I have a Merry Mac LSC wood chipper (similar to https://www.mackissic.com/product/mighty-mac-leaf-shredder-chipper-lsc/). I made the mistake of turning it on its side to remove debris from the blade. ...
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0 votes
1 answer
75 views

Cheap carburator or not?

I've got a generator(15 years old. Good shape. Briggs engine) gifted to me. It didn't want to start but I was able to get it started by spraying carb cleaner into the choke tube and it ran alright. ...
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0 answers
75 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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1 vote
0 answers
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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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1 vote
0 answers
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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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0 votes
1 answer
425 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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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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1 vote
1 answer
2k 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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0 votes
1 answer
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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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5 votes
2 answers
4k 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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1 vote
0 answers
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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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3 votes
1 answer
182 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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1 answer
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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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2 votes
1 answer
6k 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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0 votes
1 answer
95 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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0 votes
0 answers
39 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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2 votes
2 answers
40 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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0 votes
0 answers
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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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1 vote
1 answer
56 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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2 votes
5 answers
5k 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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2 votes
1 answer
47 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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2 answers
2k 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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1 vote
2 answers
72 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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1 vote
0 answers
831 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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0 votes
1 answer
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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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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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1 vote
2 answers
5k 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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1 vote
1 answer
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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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1 vote
1 answer
2k 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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1 vote
0 answers
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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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1 vote
0 answers
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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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