Lee Bullen wants Ayr fans to turn out in numbers as his side bids to complete a derby double.
United will aim to beat Kilmarnock for the second time in a month when the bitter rivals clash under the Friday night lights.
And Bullen says his troops – who are flying after three wins in four – can be roared on to victory by a bumper home gate.
He told the Ayrshire Post: “The fans have been brilliant since the day I arrived and I mean every word of it when I say they make a real difference.
“Up at Killie the other week, they were tremendous from start to finish and the scenes at the end showed what it meant to our boys.
“We want to start creating that kind of atmosphere at Somerset as well. This has to be a difficult place for teams to come.”
Ayr have won three on the bounce away from Somerset but have struggled for the same rhythm on home soil.
Bully confessed: “I think it’s more a mental thing than quality, as we proved at Raith on Saturday.
“The confidence is there among the squad and we can’t wait for Friday night now.
“We know that Killie will come here hurting after the result last month.
“They’ll use it as motivation and we need to be aware of that.
“But at the same time, we’re playing well and know we can cause anyone problems.”
Bullen added: “This will be a passionate night and there are no better games to be involved in as a player, manager or supporter.
“The last derby is away and gone as far as we’re concerned and that counts for nothing come this Friday.
“We need to be at it from the first whistle and that’s why the fans can play such a big role, as I’m sure they will.”
United will add new signing Alex Kenyon to the squad after the midfielder signed on Monday.
Ben Dempsey should be over his thigh strain, while Sean McGinty (hamstring) and Jack Baird (back) should also be fit to be included.
Blaine Rowe tweaked his hamstring in a reserve outing at Hamilton last week and will be monitored.
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