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Engine dies when rapidly closing throttle

Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=51839
Printed Date: December-22-2024 at 2:13am


Topic: Engine dies when rapidly closing throttle
Posted By: Wilhelm Hertzog
Subject: Engine dies when rapidly closing throttle
Date Posted: December-21-2024 at 9:32am
My engine tends to die when I close the throttle suddenly - like when maneuvering at low speed to dock and having to quickly shift from forward into reverse. Searching the web suggests that:
  1. Idle speed is too low. But in gear idle is around 650, and neutral around 800, which I think is about right. I recently cleaned the carb and set idle at max vacuum etc.
  2. Carb is running too rich. Apparently rapidly closing the throttle cuts off air supply to the engine, creating a temporary rich condition in the intake. Carb is stock standard, so only adjustment to lean it out would be float level I guess.
Any thoughts on the above? Anything else that could be causing this?


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1982 Ski Nautique PCM351W RR II Velvet Drive 10-17-003 1:1 II PerfectPass Stargazer
Do not go gentle into that good night. Rage, rage against the dying of the light.


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