I thought I would write this down as it may help someone else.
I bought this machine about 3 years ago, cleaned and oiled it, but never used it much as it was noisier than the 99k, and quite heavy going compared to the light touch of the 99k.
Long story short, I got it out yesterday as it was handy, gave it a drink of oil, but it wasn't running well at all. So, more oil, change needle, tension, no better.
Today it was dripping oil, but still running heavy, and starting to irritate me. Eventually, I decided that it was either thread in the bobbin race, or some other stray lint. Dismantled the bobbin area, no lint but I gave it a good clean anyway, and then I noticed a bit of lint in the feed dogs. Did I say a bit, it was felted, but unnoticeable, so I got a tiny screwdriver and set to clean it. You've never seen anything like it! Completely felted up. Well, not now it isn't!
Gave a spray of Plusgas in case anything else wa gummed up, and decided to adjust the belt.
What a difference!! Still not as quiet as the 99k, but running smoothly, and no help needed to start the seam (the belt was jamming before).
I'm now happy with the machine, but still can't use it until it stops dripping!
(I'm sewing white)
Jessie