Three of the four leaders in Rhodesia's biracial government refused yesterday to reverse their decision on the firing of the outspoken black justice minister, Byron Hove.

The refusal reflects the growing gap between Bishop Abel Muzorewa and the other three members of the ruling Executive Council.

It also bodes ill for the fragile government because Muzorewa's United African National Council has said that unless Hove, a Muzorewa's appointee, is "unconditionally" reinstated, it will withdraw from the so-called Salisbury agreement signed by Muzorewa, Prime Minister Ian Smith, and two balck leaders, the Rev. Ndabaningi Sithole and Chief Jeremiah Chirau.

The transitional government is supposed to hold elections before Rhodesia is to become the independent black-run contry of Zimbabwe at the end of this year.

Hove, 38, a lawyer who has lived Brniitain for the past 12 years, was fired Britain for the past 12 years, was fired last month after only two weeks at his post for refusing to retract statements urging aggressive recruitment and promotion of blacks in the army and police.

Although the Executive Council, comprised of Smith and the three black leaders, fired Hove, Muzorewa said he did not participate in that decision.

The whites became upset by hove's remarks since, under the Salisbury agreement the transitional police and army, as well as the judiciary, are to remain as they were under Smith's all-white rule.

The Executive Council said that it "has decided not to reverse its earlier decision that Mr. Hove be removed from office. Bishop Muzorewa reserved his position in this regard."

Muzorew has said that without his party, which is believed to have jajority support among Rhodesia's 6.7 million blacks, the transitional government "can kiss goodbye to domestic and interationnceroniiog - al ntand and international recognition - and that is a fact."

The party has a meeting scheduled for Sunday tod iscuss what it will do.

The United States and Britain haverefused to recognize the biracial government because it does not include the two guerrilla leaders, Joshua Nkomo and Robert Mugage who live outside Rhodesia. Without their participation, the West believes that the guerrilla war, involving about 7,000 to 8,000 guerrillas, can not end.