The 33-year-old seamer finished with five for 56 to help reduce Jamaica to 215 all out off 49.1 overs, crippling their pursuit of 233 for victory at Queen’s Park Oval.
Opener Nkrumah Bonner stroked 51 at the top of the order, Dave Bernard Jr got 40 and Andre McCarthy, 37, while John Campbell hit 26.
Seamer Kevon Cooper chipped in with three for 34 to support Emrit.
Earlier, T&T were guided to 232 all out off 49.3 overs by Darren Bravo’s 55, with support coming from his West Indies teammate Kieron Pollard with 41.
Dwayne Bravo, the discarded Windies one-day skipper, scored 34 and wicketkeeper Steven Katwaroo stroked 31.
Fast bowler Derval Green claimed three for 65, while left-arm spinner Nikita Miller (2-18), speedster Marquino Mindley (2-36) and seamer Dave Bernard (2-48), all finished with two wickets apiece.
The victory followed on from Friday’s five-wicket victory over West Indies Under-19s.
Sent in, Red Force lost the attacking Evin Lewis cheaply for five in the fourth over with the score on eight and required Darren Bravo’s half-century to provide stability.
He hit eight fours and a six off 82 deliveries, adding 34 for the second wicket with opener Nicholas Sookdeosingh (19) and 31 for the third wicket with Jason Mohammed (six).
Miller struck, prising out Sookdeosingh and Mohammed, while Darren Bravo fell to leg-spinner Damion Jacobs to leave Red Force on 105 for four in the 26th over, but the experienced Dwayne Bravo and Pollard came together in a positive 58-run, fifth-wicket partnership to steady the innings.
Bravo faced 59 balls and counted five fours, while Pollard struck three fours and two sixes in an up tempo knock that required just 44 balls.
However, once Dwayne Bravo was lbw to Bernard in the 39th over, the last six wickets crashed for 69 runs.
Jamaica then seemed favourites for the win when Bonner and Campbell put on 45 for the first wicket, but Emrit struck three telling blows — two in the first over of his spell — to reduce the visitors to 118 for five in the 31st over.
He first had Campbell caught at the wicket prodding forward to the second ball and two deliveries later, had captain Tamar Lambert taken at slip by Dwayne Bravo without scoring.
Bonner and Test batsman Jermaine Blackwood (14) added 43 for the third wicket to defy the Trinidadians until Emrit struck again in his sixth over, claiming Blackwood bowled off the inside edge in the 21st over.
Three wickets tumbled for 30 runs until McCarthy and Bernard posted 48 for the sixth wicket to prop up the innings and once again leave the game an open affair.
Bernard’s knock included two fours and two sixes and required 50 deliveries, while McCarthy hit three fours off 64 balls.
However, McCarthy top edged a cut behind off Cooper to set off a slide where the last five wickets fell for 51 runs.
Bernard was still there at the start of the final over with Jamaica needing 18 to win but was bowled off the first ball by Dwayne Bravo, as he looked to improvise.
E Lewis b Green 5
N Sookdeosingh b Miller 19
DM Bravo c Blackwood b Jacobs 55
J Mohammed c Bonner b Miller 6
DJ Bravo lbw b Bernard Jr 34
K Pollard c & b Green 41
K Cooper c Bonner b Green 5
+S Katwaroo c Miller b Bernard Jr 31
*R Emrit lbw b Mindley 8
S Narine b Mindley 3
R Rampaul not out 2
Extras (lb3, w19, nb1) 23
TOTAL (all out, 49.3 overs) 232
Fall of wickets: 1-8, 2-42, 3-73, 4-105, 5-163, 6-170, 7-188, 8-223, 9-227, 10-232
Bowling: Mindley 10-0-36-2, Green 10-0-65-3, Miller 10-4-18-2, Jacobs 10-0-62-1, Bernard 9.3-0-48-2
N Bonner c wkp Katwaroo b Mohammed 51
J Campbell c wkp Katwaroo b Emrit 26
T Lambert c DJ Bravo b Emrit 0
J Blackwood b Emrit 14
A McCarthy c wkp Katwaroo b Cooper 37
+H Miller lbw b Cooper 4
D Bernard Jr b DJ Bravo 40
*N Miller b Cooper 4
D Green b Emrit 6
D Jacobs b Emrit 3
M Mindley not out 4
Extras (b4, lb8, w9, nb5) 26
TOTAL (all out, 49.1 overs) 215
Fall of wickets: 1-45, 2-45, 3-88, 4-111, 5-118, 6-164, 7-170, 8-176, 9-211, 10-215
Bowling: DJ Bravo 7.1-0-30-1, Rampaul 7-0-40-0, Emrit 10-1-56-5, Cooper 10-0-34-3, Narine 10-1-31-0, Mohammed 5-0-12-1
Result: Red Force won by 17 runs
Points: Red Force 4, Jamaica 0
Umpires: N Duguid, L Reifer Jr
EMRIT… Trinidad Red Force captain took five for 56
DARREN BRAVO… contributed 55 to winning cause