GALLE (Sri Lanka) (AFP) - Bad weather appeared the main stumbling block in Sri Lanka's bid to win the first Test after illness-hit New Zealand were boxed into a corner on Friday. The tourists, set an improbable target of 413 following an unbeaten century by Tillakaratne Dilshan, plodded to 30-1 in 13 overs by stumps on the fourth day at the Galle International Stadium. Dilshan made 123 not out as Sri Lanka declared their second innings at 259-4 at the stroke of tea. A sharp shower during the tea break interrupted play by 40 minutes but New Zealand lost the wicket of Daniel Flynn before stumps when he was caught in the slips off Nuwan Kulasekara. Martin Guptill was unbeaten on 17 and Ross Taylor was on eight when bad light stopped play with 14 overs remaining in the day. Rain has been forecast during the final day's play on Saturday in which Sri Lanka have three sessions to bowl out the tourists and take the lead in the two-Test series. New Zealand may be without influential batsman Jesse Ryder and wicket-keeper Brendon McCullum in their second knock after the duo suffered a stomach bug and were confined to their hotel rooms on Friday."They are sick, very sick, but we hope they will be able to bat if required," said Kiwi coach Andy Moles."It's been a difficult day. Not only those two, but 13 of our 15 players have been hit by the bug. At one stage today, two of our support staff were in whites ready to go out and field. "But that won't be an excuse. We are only looking to save this match and I am confident it can be done if the batsman show the application and determination they are capable of." Sri Lanka accepted New Zealand's request to field reserve wicket-keeper Reece Young on Friday since Ryder had been nominated to don the gloves if McCullum got injured. Rules do not normally allow anyone outside the playing XI from keeping wicket. Earlier, Thilan Thushara and Muttiah Muralitharan finished with four wickets each as New Zealand, replying to Sri Lanka's 452, were bowled out for 299 in their first innings. Muralitharan, Test cricket's leading bowler, had Iain O'Brien caught behind to claim his 100th wicket at Galle and take his overall record tally to 774 wickets. Thushara then bowled Daniel Vettori in his first over, but not before the New Zealand captain had contributed a defiant 42. Dilshan, promoted to open the innings in this Test for the first time in his career, followed a brilliant 92 in the first innings with 12 boundaries and a six in his ninth Test century. Dilshan held out little hope for New Zealand if bad weather did not interfere on Saturday. "We can't control the weather, but the wicket has started to turn as Vettori showed today," he said. "It will not be easy to play Muralitharan on this wicket for an entire day." Dilshan, batting in his typically aggressive manner, put on 101 runs for the second wicket with skipper Kumar Sangakkara and 54 for the third with Mahela Jayawardene. Prasanna Jayawardene hit a 26-ball 30 during a fifth-wicket stand of 54 with Dilshan before skipper Kumar Sangakkara declared the innings. SCOREBOARD SRI LANKA, 1st innings: 452 (T. Dilshan 92, M. Jayawardene 114, T. Samaraweera 159, D. Vettori 4-78, C. Martin 4-77) NEW ZEALAND, 1st innings:299 in 116 overs T. McIntosh 69 J. Ryder 42 SRI LANKA, 2nd innings: T. Paranavitana c Taylor b O'Brien 5 T. Dilshan not out 123 K. Sangakkara run out 46 M. Jayawardene c and b Patel 27 T. Samaraweera c Taylor b Vettori 20 P. Jayawardene not out 30 EXTRAS: (b5, lb3) 8 TOTAL: (for 4 wkts decl, 49 overs) 259 Did not bat: Angelo Mathews, Muttiah Muralitharan, Ajantha Mendis, Thilan Thushara, Nuwan Kulasekara. Fall of wickets: 1-19 (Paranavitana), 2-120 (Sangakkara), 3-174 (M. Jayawardene), 4-205 (Samaraweera). BOWLING: Martin 5-1-25-0 O'Brien 8-1-45-1 Oram 5-0-31-0 Vettori 19-3-81-1 Patel 12-0-69-1 NEW ZEALAND, 2nd innings: M. Guptill not out 17 D. Flynn c M. Jayawardene b Kulasekara 0 R. Taylor not out 8 EXTRAS: (b4, lb1) 5 TOTAL: (for one wkt, 13 overs) 30 Fall of wicket: 1-1 (Flynn). BOWLING: Kulasekara 3-0-10-1 Thushara 2-2-0-0 Mendis 4-1-9-0 Muralitharan 4-2-6-0 New Zealand target: 413 runs Toss: New Zealand Umpires: Daryl Harper (AUS) and Nigel Llong (ENG) TV umpire: Asoka de Silva (SRI) Match referee: Andy Pycroft (ZIM)