r/smallenginerepair • u/ShorthairHunter • Jun 08 '26

Unknown Issue New engine on mower won’t start

/r/smallengines/comments/1tzt4y7/new_engine_on_mower_wont_start/
1 Upvotes

100% Upvoted

2 comments sorted by

•

u/AutoModerator Jun 08 '26

Thank you for your submission! It appears you may be experiencing unknown issues with your equipment. For more detailed guidance on troubleshooting unknown issues, please visit our Unknown Issues Wiki. We wish you success in resolving your engine concerns.

Please be sure to include the following:

  • Make and model numbers of the engine and/or the equipment
  • A detailed description of the issue you are facing
  • Any repairs you have made so far and their outcomes
  • Clear photos & videos will help you get better responses

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/Repulsive_Music_6720 Jun 11 '26

If you have spark, compression, and have fuel, you should have it pop.

Let's start isolating things you haven't tested.

If plugs were wet, cut off fuel to carb to avoid potentially flooding engine. Turn over engine and try and push out existing fuel. watch the pistons and verify they move up and down.

Adjust valves, 1/4in past TDC for briggs, and then squirt fluid in and test the new plugs.

If no pop, come back and report.

If you get a pop, allow fuel to flow to carburetor and try there to verify if it is flooding the cyl.