Tech junior second baseman Joel Buchenauer drew a leadoff walk in the bottom of the third and scored on an infield groundout by Scooter Jordan to tie the score at 1-1.
Junior Jon Slack got an RBI single in the bottom of the fifth to give Tech a 2-1 lead and senior catcher Willie Durazo added two more runs on a bases loaded single through the right side.
The Raiders (30-16) took a 5-1 lead in the bottom of the sixth on an RBI sacrifice fly by Slack. Gera Alvarez extended his current hitting streak to 27 games with an infield single in the inning.
After allowing two hits and a run in the first inning, Fouts pitched perfectly, retiring 18 consecutive batters during one stretch. He surrendered two hits in the eighth, but escaped the jam and improved his record to 6-5 this season.
Michael Shandler took the loss for the Islanders and fell to 0-3 this season.
Tech and Texas A&M-Corpus Christi will play the series finale of the three-game set at 1 p.m. on Sunday at Dan Law Field.