He leaves one-season into a two-year contract.

The Geelong-based Davey will coach the Cobras for the last time against Sunbury in the Ballarat Football League at Sunbury on Saturday.

Davey said while he had enjoyed his time at Maddingley Park, he believed the timing was right for the club as well as his life away from football. "It's my call."

He said Bacchus Marsh was in an on-field rebuilding phase which would probably need another three years.

Davey believes the club would be best suited having a coach who could see that process through to the end rather than facing the prospect of having to go through another change of leadership midway through it.

He said any change down the track might delay the process.

The non-playing coach said if he lived in Bacchus Marsh he would feel comfortable staying in the role, but the travel factor did not make it possible.

"You have be in it 100 per cent. I believe we need to train three times a week, but I can't do that (commuting from Geelong)."

Davey said the Bacchus Marsh-Geelong road was not the safest and he had been forced off the road several times to avoid collisions.

"I have a young family and I have to put them first. It's not fair on them."

Davey thanked the Bacchus Marsh committee for its support. "They've been great as have been the players."

Davey filled a vacancy left by premiership coach Travis Hodgson, having been a premiership coach himself at Banyule in the Northern league.

He said he had enjoyed the challenges of the BFL, his first experience in a non-metropolitan competition.

"It's very different to metro football. I've enjoyed the great ground surfaces and the history," Davey said.

Bacchus Marsh general manager Adam Sutherland said Davey was leaving on good terms.

"There's no angst.

"Right coach, wrong time. The stars just didn't align unfortunately. That's probably the best way to describe it. It's disappointing for everyone," he said.

Bacchus Marsh has made two changes for Davey's farewell as its strives for a 10th consecutive win in meetings with the Lions.

Matt Chisari is out with concussion.

Coming off a bye, Sunbury has three changes, with captain Andrew Duhau serving a one-match suspension and dangerous small forward Jack Landt injured.