iFixit - Answers With Device "Small Engine"

Honda General Purpose Engine GX25: Why does the oil turn black every use?

Sat, 29 Apr 2023 05:53:14 -0700

after running my brushcutter fo an hour it stops and the oil is black

⟐ Commented 4月 29, 2023 at 5:53 GMT-7

Briggs and Stratton 282H07-0196-E1: My Briggs & Stratton engine will fire up than dies - RESOLVED

Sat, 25 Mar 2023 01:12:50 -0700

My engine will fire up then it dies. Sometimes I can get it to stay running but it struggles to stay running. I have put new air filter new spark plug replaced carburetor with 3 different ones. I’ve made sure the valves were right and I have replaced the gas cap. I’ve tried everything I could think of and just can’t figure it out. I’ve also replaced gaskets and everything looks good as far as cylinders and pistons.

⟐ Edited 3月 25, 2023 at 1:12 GMT-7

Small Engine: No fuel to spark plug Briggs & Stratton #12T402-2136-F8

Fri, 24 Feb 2023 04:36:17 -0700

Ok. I’ve cleaned the carb (extensively), even put on a new one. Changed the oil, cleaned the fuel lines (all), new air filter, new spark plug, cleaned the gas tank, new fuel, everything I can think of. All gaskets are present. There is no fuel filter on this model. Throttle and choke checked. No gas leaks, no oil leaks. Any ideas? (Same thing is happening on my TROY built weedwacker also-weird).

Pls help!

Nicky

⟐ Commented 2月 24, 2023 at 4:36 GMT-7

Small Engine: Adjusting valves on 280000 and 310000 series briggs & stratton engines

Tue, 30 Aug 2022 12:56:02 -0700

I have two riding lawn mowers I decided to purchase to start re-learning small engine repair on. One has a 287707 14.5HP and the other has a 31H777 18HP Briggs and Stratton engine. Both are OHV Single Cylinder Series; 280000 and 310000 respectively.

First things first, I figure I’ll verify easy to reach parts that usually need inspection and adjusting.

Currently, I’m focused on the OHV Covers underside, i.e. inspecting all the parts and setting valve intake and exhaust rocker arm clearance.

This document shows the gap clearance requirements for the intake and exhaust valve’s with their rocker arm. http://www4.briggsandstratton.com/miscpd...

However, I haven’t found a repair manual for each engine series yet since the holidays and am therefore not sure what the torque specifications are for the adjustment stud, adjustment nut and adjustment lock screw.

Does anyone know what the repair or other manual for each engine series specifications are and maybe any recommended advice regarding torque specs?

⟐ Comment deleted 8月 30, 2022 at 12:56 GMT-7

Briggs and Stratton 675 Series Repair: Oil leak from exhaust

Fri, 22 Jul 2022 10:34:09 -0700

== Oil blowing from exhaust muffler .runs well and starts ok.this problem seemed to start after fitting new drive belt.many thanks.a ==

⟐ Commented 7月 22, 2022 at 10:34 GMT-7

Briggs and Stratton 675 Series Repair: Were is the primer button?

Fri, 22 Oct 2021 07:15:17 -0700

Were is the primer button?

⟐ Commented 10月 22, 2021 at 7:15 GMT-7

Small Engine: Lawn mower stalls then won't start

Sun, 20 Dec 2020 00:44:51 -0700

Snapper 190cc lawn mower stalls and then won’t start- have change air filter, spark plug and clean the carb

⟐ Answer deleted 12月 20, 2020 at 0:44 GMT-7

Briggs and Stratton 675 Series Repair: Why is my Briggs & Stratton 675 series mower engine running too fast

Sat, 19 Sep 2020 18:17:04 -0700

Part way through my last mowing session, the engine suddenly started running at high revs, the accelerator lever does not alter the engine speed even though it works correctly. Is there an adjustment screw on the carburettor? Or is it a more serious issue.

⟐ Commented 9月 19, 2020 at 18:17 GMT-7

4-Stroke Small Gas Engine: Why does my lawnmower start and die even with a new carburetor?

Sat, 09 May 2020 10:51:04 -0700

We have a Yard Machine push lawnmower with a 09p702-0004-F1 Briggs and Straton engine on it. We got the lawn mowed once this spring with it, but since then it has refused to run. It turns over, starts up and then dies.

After researching on the internet, we cleaned the carb with some carb cleaner. If you spray carb cleaner in it started and ran as you kept on spraying carb cleaner in. We took apart, then reassembled the carb. That didn’t help. We checked the fuel line - fuel flows freely out of it. Drained all of the fuel out, put in new fuel. Nope. Tried it with the gas tank cap off. Nada. Constantly pumping the primer once it starts doesn’t seem to help at all. Cleaned the spark plug.

We then ordered a replacement carburetor. Installed that today - still no go. It continues to turn over, start and then die immediate.

Where to go from here? The lawn grows longer by the day - we resorted to using the string trimmer on it last week . . .

⟐ Answered 5月 09, 2020 at 10:51 GMT-7

Small Engine: time on small engine tear down?

Mon, 30 Mar 2020 14:50:22 -0700

guess at time it will take to disassemble honda 389cc engine

⟐ Answered 3月 30, 2020 at 14:50 GMT-7

Small Engine: What is this? Please help

Tue, 14 Jan 2020 13:30:38 -0700

Found it like this one day…wont start no noise no nothing it just sits there please help!!! Where does the other end go???

⟐ Commented 1月 14, 2020 at 13:30 GMT-7

4-Stroke Small Gas Engine: Briggs and Stratton 14.5 OHV 500cc Valve Settings

Sun, 12 May 2019 22:52:52 -0700

Valve cover has the following stamped on it Model Type Code 31A507 0871 05 120322ZD. Reqire Exhaust and Intake valve setting for this particular model. Thank you.

⟐ Commented 5月 12, 2019 at 22:52 GMT-7

Briggs and Stratton 675 Series Repair: Run problem on old Briggs and Stratton Troy Bilt tiller engine.

Fri, 13 Apr 2018 06:41:37 -0700

Engine will start if choke is closed, but dies when choke is opened. It will continue to run with choke almost closed for a short time, then it dies. I've verified that there is not a problem with the fuel line or filter. When the line is disconnected from the carburetor, fuel flows freely. This tiller is an early version build date in the early to mid seventies.

⟐ Commented 4月 13, 2018 at 6:41 GMT-7

Briggs and Stratton 675 Series Repair: What type of fuel do I use, straight gas or mixed?

Sat, 29 Jul 2017 20:44:25 -0700

What type of fuel do I use, straight gas or mixed?

⟐ Answer accepted 7月 29, 2017 at 20:44 GMT-7

Small Engine: Bogging or engine slows down when turned to full throttle.

Mon, 24 Apr 2023 05:47:47 -0700

I have a brand new 66cc motor kit that mounts onto a bicycle frame is known as an 80cc Skyhawk but in Canada it's 66cc.

I used a High-Performance carb but I couldn't get it to idle slowly with that carb I backed the idle screw nearly all the way out and the engine ran faster and then it blew the spark plug right out of the cylinder head.

In response to this I put the stock carburettor on and now she runs fairly well aside from the fact that I can't throttle past 1/4 throttle and it sure would be nice to be able to get the rest of the power from the engine.

Everything is brand new when it's idling she purrs. Another thing that happens is when I throttle down the engine takes a few moments to idle down which is odd.

When I am riding and try to go past 1/4 throttle the engine slows down and I may as well be peddling but at 1/4 I can get to around 30 KPH but she can go faster if I can figure out what is causing the issue with either carburettor but I am not sure what problem I am looking for and am hoping someone can help direct me.

⟐ Answered 4月 24, 2023 at 5:47 GMT-7

Small Engine: How do I cure this?

Sun, 26 Apr 2020 19:13:44 -0700

My ride on mower starts fine and ticks over as it should but when I release the brake and try to move forward or reverse the engine stalls then dies completely, it will not move in any direction. Also if I try to engage the blades the divine then stalls and cuts out. Any ideas how to stop this ?

⟐ Answered 4月 26, 2020 at 19:13 GMT-7

Briggs and Stratton 675 Series Repair: My Toro self propelled lawn mower starts right up and then dies.

Tue, 10 Mar 2026 16:47:06 -0700

My engine starts up and runs for a few seconds and then dies. I've clean my carburetor and took the float bowl off and cleaned it out. The bowl had a small pieces of a gel substance in it. I removed the carb and the float bowl and blew them all out. Also took the float of and needle valve and blew out the carb. I've checked the fuel lines and no cracks. Put it back together and it does the same thing. Any suggestions??

⟐ Commented 3月 10, 2026 at 16:47 GMT-7

4-Stroke Small Gas Engine: mower clicks several times before starting

Sun, 17 Apr 2022 09:51:43 -0700

Simplicty consumer zero turn with 20hp Vangaurd. I replaced engine with identical engine from parts machine. starter has always clicked at the starter several times before cranking and starting. so I replaced starter with one from the blown engine. It does the same thing except now it is the solenoid that is clicking.

⟐ Commented 4月 17, 2022 at 9:51 GMT-7

Honda General Purpose Engine GX200UT2: engine wont turn on

Mon, 28 Jul 2025 16:14:36 -0700

whenever i try to turn on engine it sputters a little but never starts

⟐ Answer edited 7月 28, 2025 at 16:14 GMT-7

Small Engine: Husqvarna 128LD won't start

Wed, 23 Apr 2025 19:00:41 -0700

Trimmer won't start. New carburetor, new fuel lines and filter, new air filter, new gas/oil mix. Primer works, bulb fills, gas goes to carb and through return line. Checked spark plug, and it was completely dry, even after many pulls at full choke. Seems fuel isn't getting to the cylinder. Anyone have ideas on what to check next?

⟐ Answered 4月 23, 2025 at 19:00 GMT-7