HSOB kicked another penalty to stay in touch with YMP before conceding two more tries in the last 10 minutes of the first half, taking the score to 33-11.
YMP scored two more tries at the start of the second half to widen the gap between the teams to 36 points before a spirited comeback from HSOB.
The last 20 minutes of the game was all HSOB, who scored 19 unanswered points.
Three tries narrowed the score but it was too little, too late for HSOB.
YMP coach Brian Leach said the team knew they needed to start well, and did.
“HSOB kept coming back and their forwards did a lot of damage . . . they played their best game of rugby in the last 20 minutes.”
Leach said Milner had another strong game at centre, “cutting their defence to pieces”.
He was happy with his team's performance; they identified starting strong in each half, and delivered.
“It was a tick for us, we're happy with our performance.”
Seth Lundon had his first game of the season, starting at blindside, and got the union's player of the game award.
He was in as injury replacement for Shyann Wyllie, who was still out after a big concussion, said Leach.
“Shyann might have to fight for position now, Seth played really well.”
Efforts to reach HSOB representatives for comment were unsuccessful.