The Sea Eagles rocketed out of the blocks opened the scoring through young winger Tom Trbojevic, who ended up with a double.
A Cherry-Evans grubber kick hit a Broncos player and found its way to Lyon who popped a magical flick pass to the winger on the right edge.
Manly scored again three minutes later with a stunning try to Foran.
The Sea Eagles pushed it to the right edge and Lyon beat a couple of defenders before kicking inside for Brett Stewart who kicked off the ground.
Brisbane's Corey Oates looked as though he defused the situation by diving on the ball, but he lost control on his own line and Foran picked it up and scored.
Lyon was at it again soon after, scoring himself when he was able to get on the outside of Jack Reed to score on the right edge.
Manly bagged their fourth try when Lyon combined brilliantly with Trbojevic.
The winger tapped a Daly Cherry-Evans cross-field kick back into play and Lyon produced a deft kick into the in-goal with Jesse Sene-Lefao diving on the ball to score just before halftime.
The Sea Eagles scored four second-half tries after repelling a brief Brisbane fightback with Foran finishing the night with a double.
The victory continued Manly's great record in Gosford, having won 13 of 16 matches at the Central Coast Stadium.
Toovey became just the sixth coach in Manly's history to coach them to 100 or more games.
Broncos coach Wayne Bennett admitted his side was off the pace from the opening whistle.
"They started extremely well and I thought our start and was as poor as I've seen us start," he said.
Bennett dismissed suggestions his side took the Sea Eagles lightly.
"I don't think so. I just didn't think we came here in the right frame of mind and after that ... it was indicative of our start and we didn't get any better after that," he said.
Lyon admitted playing for Toovey was a factor in lifting the Sea Eagles.
"It was definitely a motivation. We wanted to play well. Geoff was great all week and he got us up for the game and I'm glad we got the win for him," Lyon said.
Toovey did his best to play down the emotion of the victory and said the clash was simply about getting a result.
"I've been focused like the players on winning this match. We're still in there with a chance, we know that and all we can do is turn up every week and put a performance in and try and win the match," said the Manly coach.
The Sea Eagles sit just one win outside the top eight and face South Sydney at Brookvale next Friday night.
Brisbane, who sit equal on points but first on differential, take on Canterbury at Suncorp Stadium, also on Friday night.
- AAP
