The return of a 121-year-old steam engine on Wales' highest peak after refurbishment has been "delayed".
The Snowdon Mountain Railway's Loco No 5, named Moel Siabod, has undergone a "comprehensive" £60,000 refit after being taken out of service in 2000.
Loco No 5 started carrying tourists up the 1,085 metres to Snowdon's summit when the railway opened in 1896.
The narrow gauge engine was due to return when Snowdon Mountain Railway restarted its summer service on Friday.
But the locomotive's return has been put back for "about three weeks" because restoring it to service on Friday "was not right".
Loco No 5 was built for the railway in 1895 by the Swiss Locomotive & Manufacturing Company and named after a neighbouring mountain in Snowdonia.
The 4.7 miles (7.6 km) route from Llanberis in Gwynedd to Snowdon's summit building, Hafod Eryri, attracts an estimated 130,000 visitors a year.
The view from Snowdon's peak, taking in the 'magical' Llyn Llydaw lake, was named the UK's best view earlier this month.