912ULS maintenance

[Wagondriver]

I am looking at and probably going to buy a plane with two 912ULS engines on it. They have right at 1000hrs. What service items are coming up at 1000hrs? I can, and do, look these things up on the internet, but I am interested in hearing from people familiar with these engines.
Mechanical fuel pumps and fuel lines have been replaced at about 980 hours. They have been run mostly on unleaded fuel, but have seen some 100ll, but it sounds like only on long cross country trips.

What areas should I pay special attention to when I inspect it prior to purchase?

 

[Learnin’ to fly…]

I am looking at and probably going to buy a plane with two 912ULS engines on it. They have right at 1000hrs. What service items are coming up at 1000hrs? I can, and do, look these things up on the internet, but I am interested in hearing from people familiar with these engines.
Mechanical fuel pumps and fuel lines have been replaced at about 980 hours. They have been run mostly on unleaded fuel, but have seen some 100ll, but it sounds like only on long cross country trips.

What areas should I pay special attention to when I inspect it prior to purchase?

Gearbox inspection on each and probably also due for carb clean and re-balance. Also look into if it was all the rubber hoses or just the fuel lines replaced. On your compressions - you’ll want them run at 87 instead of 80.

 

[idahoflier]

The serial numbers. Some early 912ULS' have a TBO of 1,200 and 1,500 hrs respectively. No worries on 100LL as long as it's run < 30% of the time otherwise more frequent oil changes should have been performed. As noted above gearbox inspection at 1,000 hrs so that will take care of any lead in it. Verify rubber replacement (coolant hoses, oil and fuel lines if not teflon, carb sockets, carbs, expansion back plate) was performed within the last 5 years.

 

[GeorgeC]

@Capt. Geoffrey Thorpe

 

[samiamPA]

In addition to the above note about some earlier models having a 1200 hour TBO, there was an issue with the earlier models as well with case fretting which typically would cause the start of oil leaks around a thousand hours and there's really not any fix other than overhaul/replace. I think they fixed this problem in 2006 or 2007, but you would need to check with the case number to find out if it is a new or old design.