# 26 Ultra- Rpm's Degrade in gear after 1 to 2 minutes

**URL:** <https://nonsuch.discourse.group/t/26-ultra-rpms-degrade-in-gear-after-1-to-2-minutes/9934>\
**Category:** Newsgroups Archive Prior to 2025\
**Created:** [May 31, 2025, 10:03pm UTC](https://nonsuch.discourse.group/t/26-ultra-rpms-degrade-in-gear-after-1-to-2-minutes/9934 "2025-05-31T22:03:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![user24](https://avatars.discourse-cdn.com/v4/letter/u/c4cdca/32.png) [@user24](https://nonsuch.discourse.group/u/user24)\
**Post date:** [May 31, 2025, 10:03pm UTC](https://nonsuch.discourse.group/t/26-ultra-rpms-degrade-in-gear-after-1-to-2-minutes/9934/1 "2025-05-31T22:03:19Z")

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Richard,  
Have you checked to see if the fuel tank vent line is clear and not clogged with spider debris? Your symptoms sound consistent with a fuel pump that is able to draw fuel in the beginning, but the longer it runs with a clogged vent line the tank will form a vacuum, and the fuel pump will not be able to pump the fuel. Anyway, something that’s easy to check and cheaper than replacing the fuel pump. I don’t know about the temperature other than to ask are you sure the right thermostat is in the engine?

Jim Cosgrove  
FATE 30U #343  
Galesville MD