Jetski Spares Repair Full Engine Rebuild Project Non Runner

1998 seadoo gs 720 2stroke . Trailer included .purchased 2 years ago as a non runner . Had engine rebuilt by jet shed .crank rebuild rebored new pistons the lot .receipt to prove cost 1050 pound .put back in .new engine mounts .but it will not turn over on the starter .was told it was because wrong lanyard .so immobilised .now lost intrest in it spare ecu with it collection from march cambs thanks andy i will split the ski if needed full rebuilt engine 1050 hull complete hull 450 trailer 350 thanks