Engine Driven Fuel Pump

[Will.iam]

Also looked inside cyl #3 when i was swapping sparkplugs and noticed these on the top of the piston. I assume that is carbon deposits? Seems rather big to me. Will they eventually wear off as i fly more LOP? Just curious. Also does that plug look ok in color? I haven’t ever seen a lead fouled plug before. I’m assuming those little specks are not a concern right? I’m looking for a big like BB size ball of lead correct?

[carusoam]

Carbon has a tendency to deposit pretty evenly, then break off leaving odd patterns behind...

Wonder how many grams of added weigh that is?

Great detail in the plug pic... there are tiny lead balls visible there...  they grow in size as more lead deposits on top of the old lead...

Proper leaning after start-up is helpful to keeping the lead balls from growing too quickly...

I haven’t seen enough plugs to have any comments of that fine of detail...

 

Best regards,

-a-

[Will.iam]

Well an update / follow up to the mysterious rough running and higher CHT blip that is now fixed. I swaped top plug with bottom plug and the roughness switched to the other mag so i took out the sparkplug and looked at it again and noticed a circular line in the ceramic on the top side (sorry didn’t get a pic) and shook the plug and something was loose as i heard a rattle. I ordered a new plug and installed it and that fixed the roughness and cht problem. Just goes to show you a plug can fail at any time even if it only had 24 hours on it since new. With the new orings on the fuel injectors I’ve also noticed the engine doesn’t surge as much when flying LOP as it did before too. 
thanks for all the tips and suggestions. 

[squeaky.stow]

On 3/4/2021 at 12:41 AM, Will.iam said:

Well thanks to the beechcraft forum they had a continental fuel injection install pdf that explained very nicely with pictures of how the turbocharged fuel injectors are assembled, thus allowing me to not only understand how to take them apart but also listed the o-ring and rubber washer i needed to order to replace them.

Hi Will,

Any chance you could share that PDF here? It’s always nice to have a better understanding of how this stuff is put together.

Mark

[Guest]

From the Continental website.

http://www.continental.aero/support/illustrated-parts-catalog.aspx

[Will.iam]

Thanks doc will have to check that out but here was what I used. 
 

https://www.csobeech.com/files/TCM-InjectorSID05-7.pdf

 

i found the color pictures much easier to use. 

[carusoam]

Depending on the plug manufacturer...

One is pretty good at supplying replacements for the known faults...

It may save some lunch money if you pursue that route...

Best regards,

-a-