engine keeps sputtering and backfiring when giving gas or under load

Question

소형 엔진

다양한 소형 엔진 수리 안내서 및 지원.

103 질문 전체 보기

john @john94

평판: 13

1

게시일: 2018년 5월 6일

옵션

engine keeps sputtering and backfiring when giving gas or under load

I have a briggs and Stratton 23 ohv engine on a john deere zero turn 425 mower. It ran perfectly last week. went to start it this week to mow and now it sputters, black smoke and backfires all when trying to give it gas. it will not run fast nor can I engage the blades as the load makes it do the same thing and cut off. I changed the plugs, cleaned the carb, checked the valves, the blades move freely. It starts up and will idle and run on the lowest throttle setting but it will not do anything else. As soon as I try to push the throttle to fast and engage the blades it goes crazy. I don't know what else to try.

이 질문에 답하기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

예 아니요

점수 1

댓글 1개

is there water in the fuel perhaps? Black smoke usually means to much fuel, backfiring, can be to much air via vacuum leak. Don't think it would be a vacuum problem though. Have you checked your air filter? As that can cause over rich mixture and the problems you're facing.

sm_vulkus 의 2018년 5월 6일

댓글 달기

답변 2개

is there water in the fuel perhaps? Black smoke usually means to much fuel, backfiring, can be to much air via vacuum leak. Don't think it would be a vacuum problem though. Have you checked your air filter? As that can cause over rich mixture and the problems you're facing. — sm_vulkus

cgulyash @cgulyash 평판: 325 5 · Answer 1 · 2019-07-20T17:56:48-07:00

가장 유용한 답변

cgulyash @cgulyash

평판: 325

5

게시일: 2019년 7월 20일

옵션

John,

It’s running rich which is probably due to something wrong with the choke. If you can get the air cleaner off and look at the choke, is it open when the engine is running? Another way this happens (too rich) is the float needle in the carb isn’t closing, so the carburetor is flooding the engine. This happens when a little bit of dirt gets stuck on the top of the float needle so it can’t close.

해당 답변은 도움이 되었습니까?

예 아니요

점수 2

댓글 달기

Michael Bradford @mikeyvedia 평판: 1 · Answer 2 · 2020-09-16T03:03:12-07:00

Michael Bradford @mikeyvedia

평판: 1

게시일: 2020년 9월 16일

옵션

I had similar problem and tried every resource I could think via internet…I asked knowledgeable friends …checked valves, replaced carb, shear key,plug…idled up and sometimes blades would engage.and thinking it might be water in the fuel I changed gas and oil….that’s when I discovered that my oil didn’t look right. Apparently the previous carburetor had let gas get into the oil and that’s why the blades wouldn’t engage !!

해당 답변은 도움이 되었습니까?

예 아니요

점수 0

댓글 1개:

that is not a valid problem solution. period. the oil can only come into contact with gasoline during the combustion stroke. then it will exit via the exhaust valve

Clubdoc 의 2023년 8월 4일

댓글 달기

소형 엔진

engine keeps sputtering and backfiring when giving gas or under load

답변 2개

귀하의 답변을 추가하세요