During his first two seasons Ilchev was a stable reserve of Ivaylo Petrov and Krasimir Kolev and played in only four matches, mainly in the Bulgarian Cup.
The goalkeeper managed to become first choice for the team during the season 2007/2008, when Petrov was already at CSKA Sofia and Kolev often suffered from injuries.
During this season Ilchev played in 28 matches and has a major role for the good performance of "Cherno More" in the championship and in the Bulgarian Cup.
From summer 2008 Fill has a very serious competition from the Moldovian national goalkeeper Evgheni Hmaruc, who came in Cherno More from the Indonesian Persija Jakarta.
In spite of this the Bulgarian was the first choice of the coach Nikola Spasov for the debut appearance of the Sailors in the UEFA Cup.