I hope this is ok to post this on your forum!
I have an airboat that has a Lycoming IO-540 D4A5 engine on it and we recently did a top end overhaul and i have a question on oil consumption.We have channel chrome cylinders on the engine. Running Phillips 20-50 Type M oil for break in.
We did the initial run in procedure as described in the lycoming overhaul manual, and after that initial hour we noticed around maybe a half a quart of consumption.
Took it and ran it for two hours the next time and tried to keep it up above 75% power for the majority of the run. Engine ran great with the temps where they should be, a little higher than normal on the CHT and plenty of power.
It consumed about 1.75 quarts that run of 2 hours. So in the first 3 hours of running, it consumed just a hair over two quarts.
It has a 12 qt sump and we have filled it to 10 initially, and gauged the consumption off of that level.
Is this normal? I have heard it takes awhile for chrome cylinders to seat compared to steel or other materials. What should i see for consumption from here on out if that is normal?
I hope this is ok to post this on here, i figured you guys would know better than any!
Thanks
I have an airboat that has a Lycoming IO-540 D4A5 engine on it and we recently did a top end overhaul and i have a question on oil consumption.We have channel chrome cylinders on the engine. Running Phillips 20-50 Type M oil for break in.
We did the initial run in procedure as described in the lycoming overhaul manual, and after that initial hour we noticed around maybe a half a quart of consumption.
Took it and ran it for two hours the next time and tried to keep it up above 75% power for the majority of the run. Engine ran great with the temps where they should be, a little higher than normal on the CHT and plenty of power.
It consumed about 1.75 quarts that run of 2 hours. So in the first 3 hours of running, it consumed just a hair over two quarts.
It has a 12 qt sump and we have filled it to 10 initially, and gauged the consumption off of that level.
Is this normal? I have heard it takes awhile for chrome cylinders to seat compared to steel or other materials. What should i see for consumption from here on out if that is normal?
I hope this is ok to post this on here, i figured you guys would know better than any!
Thanks