• Welcome aboard HomebuiltAirplanes.com, your destination for connecting with a thriving community of more than 10,000 active members, all passionate about home-built aviation. Dive into our comprehensive repository of knowledge, exchange technical insights, arrange get-togethers, and trade aircrafts/parts with like-minded enthusiasts. Unearth a wide-ranging collection of general and kit plane aviation subjects, enriched with engaging imagery, in-depth technical manuals, and rare archives.

    For a nominal fee of $99.99/year or $12.99/month, you can immerse yourself in this dynamic community and unparalleled treasure-trove of aviation knowledge.

    Embark on your journey now!

    Click Here to Become a Premium Member and Experience Homebuilt Airplanes to the Fullest!

Misfire or ??

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Dana

Super Moderator
Staff member
Joined
Apr 3, 2007
Messages
12,666
Location
CT, USA
Just when I thought I had everything sorted out... I've started to have a new issue. I'm hearing a sound, hard to describe but something between a rattling and popping sound, only at full throttle. I can hear it in the plane and people on the ground can hear it, too, when I take off. No noticeable effect on power or rpm, unlike the magneto coil issue I had last year which caused a brief rpm drop. Engine is a Mosler CB40, with an almost new (30 hour) Slick 4316 magneto with two poles shorted out, .016 gapped BPR5ES plugs with Great Plains adapters for the shielded Slick harness. Mag timing is correct at 28° BTDC. I put in new plugs and set the valves with the oil change less than 5 hours ago. I haven't yet, but will, try new plugs even though the ones in there are almost new, recheck the valve clearance, and if all else fails try swapping with an identical new magneto that a friend has for his Minimax but hasn't installed yet.

Dana
 
Back
Top