Turkish Prime Minister Bulent Ecevit accused the Carter administration yesterday of hiding behind Congress' skirts on the Turkish arms embargo issue and said he had advised President Carter that Turkey might haaave to revise manu of its policies because of American interference in Cyprus.

Ecevit indicated he may slow doown his efforts to solve the Cyprus problem and possibly boycott the Washington meeting of NATO heads of government in May.

The Turkish leader met with reporters following his two-day meeting here with Premier Konstantine Caramanlis of Greece. The meeting was declared a success by both sides. It was the first time the two men faced each other since their countries came to the brink of war following Turkey's invasion of Cyprus in 1974.

The Cyprus invasion led to the U.S. arms embargo against Turkey and yesterday's angry statements by Ecevit were etouched off by testimony on the issue given by Secretary of State Cyrus Vance befor the Senate Appropriations Committee earlier last week.

Vanc told the committee the Carter administration would decide whether or not to ask Congress to lift the embargo after publication of Turkish proposals for a Cyprus settlement and the out come of the Greek-Turkish summit here.

The Vance statement, which Ecevit said came as a "negative surprise in the middle of my friendly discussion with Mr. Caramanlis," made the Turkish prime minister "furious," according to a senior Turkish official.

It touched off a flurry of messages between Washington and this placid Seiss lakesid resort -- each one from the Americans, Ecevit said, getting "vaguer and vaguer." "In my last message I said we might have to revise many of our policies in view of this American attitude," Ecevit said.

"So far, the U.S. administration has claimed that the difficulties in restoring Turkish-American cooperation came from Congress," Ecevit said.

But recently, he claimed, congressional opposition to lifting the arms embargo had begun to crumble. Chairman Clement Zablocki (D-Wis.) of the House International Relations Committee and 12 other congressmen said in a recent letter to Vance they favor lifting the embargo if the president strongly backs the move.

"The administration's response has ben to say the least vague and unhelpful," Ecevit said. "And now Mr. Vance has indicated the administration plans to wait for the Turkish Cyprus proposals and thje results of the Montreux meeting before giving its views."

"So we have begun to doubt now whether the difficulties came really from Congress or rather from the administration itself," Ecevit said.

He charged the American linkage between lifting the embargo and the Turkish proposals on Cyprus, due to be submitted to U.N. Secretary General Kurt Waldheim soon as a prelude to resuming Cuprus peace talks, could sabotage the new peace effort befor it had even begun.

"No matter how reasonable the Turkish Cupriots' proposals are, the Greek Cypriots may be encouraged to reject them in order that pressure on Turkey will continue," he said.

Because of this, he said, he was beginning to doubt "whether it will be appropriate for the Turkish Cypriots to speed up their (peace settlement) efforts."

In addition to the Carter administration's "disruptionns andobstructions" on Cyprus, Ecevit said, "we now cannot help feeling afte Mr. Vance's statement that Americanpolitics are somehow being involved even in our discussions in Montreaux."

Despite "this unfortunate American attitude," Ecevit said, his two-day summit with Caramanlis had been a "success."

Speaking to reporters, Caramanlis said the summit had created "a climate of detente" between the two countries. The two sides apparntly made most headway onthe question of Aegean sea rights, but it was unclear wherther they made any progres on the Cyprus question.

Caramanlis said Ecevit showed him the draft of the new Turkish proposals on Cyprus. "I told him that I really wasn't curious, I didn't want to see the proposals," Caramanlis said. "Cyprus has its own govenment and (the issue) must be solved by the two Cypriot communities themselves."

A joint communique issued at the end of the talks said Ecevit and Caramanlis had established a "friendly and sincere dialogue" that they had decided to continue at "subsequent meetings."

Ecevit said senior official from Athens and Ankara would meet. "In two or three weeks time" to start detailed discussions on settlement problems between the two nations, which in addition to Cyprus include conflicting claims to Aegean oil drilling and air space rights.

Asked whether he might not attend the Washington NATO summit because of the latest Turkish-American conflict, Ecevit said: "I have not had time to think about it."

But, he said, he had told the Carter administration he wanted a decision on the embargo befor the NATO one way or another influence Turkey's relations and attitude towards NATO. So we want to know where we stand."