I would appreciate some views here for a potential cause.
Purchased a RV9a last year with 555 hours on. 0320 carb engine.
No problem starting.
Had PIO in Jan which resulted in a nose over and substantial damage. (Beautifully repaired now
The engine was removed and tested and fitted back to the plane.
The only problem that I have with it is that the first start of the day it is a struggle to start.
The one thing that I noticed is that the engine cranks over very slow. Almost like the battery is nearly flat. It has a new battery fitted.
Before I got it back the Company that fixed it said that my battery was on the way out and wanted to fit a new one which they did.
It has one magneto and one e-mag. My understanding is that if the power from the battery is too low then the e-mag turns itself off which means its trying to start only on the one magneto.
It sounds like it has a bit of spark and wants to fire but just does not catch.
Eventually it will start after about 8 or 10 attempts and then it starts ok for the rest of the day.
The engine has new rings and bearings but I doubt it has increased compression to such an extent to as cause such slow cranking.
Battery mounted on the firewall.
I don't think my old battery was on the way out. I think that after the re-installation something changed which caused the slow cranking and they assumed it was a weak battery. Battery shows good strength on the EMS.
On start I only have fuel pump switch on and Dynons come on with master.
Will check that all cables are tightly fastened and good earths.
Would really appreciate some views from those with more technical knowledge than me please.