Congo Republic votes, opposition wants boycott

* Congo Republic holds presidential vote

* President set for another seven years in power

* Opposition calls for boycott, EU sends no observers

By Christian Tsoumou

BRAZZAVILLE, July 12 (Reuters) - Congo Republic's President Denis Sassou-Nguesso is widely expected to win another seven years in power in Sunday's election, which opposition parties plan to boycott over what they say are irregularities.

Investors are watching to see whether the vote sparks a repeat of the conflict which has marred previous elections and affects political and economic stability in Africa's No.5 oil producing country.

"You should go and vote for your candidate Denis Sassou-Nguesso in peace," the president told some 100,000 supporters in a final rally just outside Brazzaville.

"Fear not and go and vote. There will not be any more war in Congo."