Ireland made it four wins from four as they adopted a safety first approach against hosts Jersey to win by four wickets.
Skipper Jack Tector's unbeaten 31 from exactly 100 balls was the bedrock of their successful pursuit of a Jersey total of just 113 at FB Fields.
Lorcan Tucker hit 17 and Aaron Gillespie a breezy 16 (4 fours) as Ireland took 37.3 overs to pass their modest target - perhaps missing yet another opportunity to further bolster their net run rate.
James Duckett (3-31) and Elliot Miles (2-25) were the most successful of a determined Channel Islanders attack.
Earlier Jersey didn't make the most of an opening stand of 53 between Will Robertson and Grant Donaldson - both of whom made 23.
In an amazing collapse they lost ten wickets for an additional 60 runs in the space of just under 14 overs to be 113 all out.
Merrion left-armer Tom Stanton (4-34) was the destroyer-in-chief, while Ben White - a late call up for the tournament to replace the injured David Delany - continued to show just why he should have been included in the first instance, with 3 for 30.
Gary McClintock (2-18) and James Mitchell (1-14) were the other successful Irish bowlers.
Ireland stay two points clear from Scotland, who beat the Netherlands in the other game of the day.
Ireland play the Dutch on Friday, before the crucial final match against Scotland on Saturday.
EUROPEAN U19 WORLD CUP QUALIFIER
At FB Fields
JERSEY 113 all out (26.5 overs, G Donaldson 23, W Robertson 23, T Stanton 4-34, B White 3-30, G McClintock 2-18)
IRELAND 117/6 (37.3 overs, J Tector 31*, J Duckett 3-31, E Miles 2-25)
Ireland won by four wickets