[Marcus Sowl]

Marcus Sowl on January 15, 2015 at 9:08 am #17592

Scott, thank you for the suggestion. It is definitely something we’re considering. On a cursory inspection we have found one plug fouled with lead, suggesting to me she’s running a little rich.
I’ll be flying it back today from a different airport since the engine failed on taxi the other day and couldn’t be restarted. Flooded, no doubt. On return, we’ll clean or replace all the plugs and see how that affects performance.

[Anonymous]

Anonymous on January 15, 2015 at 3:35 am #17591

Hi Marcus,

I’ve been thinking about this… I know you’ve replaced the fuel pump already and are considering other devices in the engine as being the culprit, but perhaps it’s too rich due to the cold, dense air. Have you tried leaning a bit?

Best,
Scott Sherer
N344TB

[Anonymous]

Anonymous on January 13, 2015 at 3:26 pm #17583

Hi Marcus,

I’m hoping that our resident expert, Steve Ells, will chime in here. He may have the help that you need. Fingers crossed.

Scott Sherer
N344TB

[Marcus Sowl]

Marcus Sowl on January 12, 2015 at 9:37 am #17582

Our 1967 Arrow I will experience very rough, but quite intermittent, engine operation in very cold weather. I’ve noticed this “hiccup” shortly after departure and also on taxiing after landing. The coughing stops but it is somewhat unnerving on departure. This does not happen in the summer during warm weather. The airplane is kept in a heated hangar. Temperatures during flight are ranging from 20F to -20F.
The engine driven fuel pump was replaced last winter which seemed to resolve the problem. However, this quirkiness has reared its ugly head again this winter.
Speculation has suggested frost on plugs, injectors turning to water and being ingested into the fuel or possible air intake blockage.
Any suggestions would be most welcome!
Thank you.