How many hrs on the 500s?

Compression/ leak down is my thoughts

He has 300 hours but runs under 4000 rpms 95 % of the time, it was fine till the guy did the props, he just had a nick in one blade and wanted to get ready for the season. I warned him that the guy trashed 4 of mine and wouldnt do anything about it but he still let him touch them. I wouldnt let the guy sharpen a mower blade now.

Call Bblades and get a test set of lab bed 28 bravos

If that fixes it buy em

Or if he only cruises get 5 blades and save money on gas but lose some top end

So will it eat drives with stock power and 5 blades ? he likes the more mpg and if he can still hit 70 mph will be happy. He knows it isnt fast and just cruises around 99% of the time, no poker runs or WFO running.

Out of the box Bravo1 28's.