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Old 10-07-2007, 05:20 PM   #1
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Default air leak

hope someone can help. i have both an ae .15 and an xtm .18 engines. i tested then for air leaks by covering the carb with my finger and blowing into the fuel inlet, then brushing soapy water over the engine. both engines leak around the base of the carbs and the around the bolt you use to tighten the carb to the block. i know a new o ring will seal the carb, but how do i seal around the bolt?

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Old 10-08-2007, 04:56 AM   #2
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Yep I'm about to fix a similar leak. Use RTV sealant for the carby and the bolts

here's a good article http://www.rchobbies.org/engine-tuning.htm
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Old 10-08-2007, 06:16 AM   #3
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Quote:
Originally Posted by mjnp06 View Post
hope someone can help. i have both an ae .15 and an xtm .18 engines. i tested then for air leaks by covering the carb with my finger and blowing into the fuel inlet, then brushing soapy water over the engine. both engines leak around the base of the carbs and the around the bolt you use to tighten the carb to the block. i know a new o ring will seal the carb, but how do i seal around the bolt?

thanks

mike
..........place a new o-ring at base of carb and use Permatex Ultra Copper.....just enough to make a good seal...
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Old 10-08-2007, 10:59 PM   #4
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how soapy the water needs to be? I nearly busted a lung trying to find a leak last night but I never saw any bubbles. Starting to think the carby might be air tight
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