1984 Mariner Outboard Models Where can I find my serial number? 222 [R] 7001904 222 [T] 7001804 422 [D] 7001304 422 [R] 7001404 422 [T] 7001204 628 [RL] 7001724 628 [R] 7001704 628 [T] 7001504 8 [ML] 7008224 8 [M] 7008204 9.9 [ML] 7010224 9.9 [M] 7010204 20 [EL] 7020524 20 [E] 7020504 20 [ML] 7020224 20 [M] 7020204 55 [EL] 7055524 55 [ML] 7055324 60 [ELPT] 7060624 60 [EL] 7060524 75 [ELPT] 7075624 75 [EL] 7075524 90 [ELPT] 7090624 90 [EL] 7090524 115 [ELPT] 7115624 115 [EXLPT] 7115644 150 [ELPTO] 7150724 150 [EXLPTO] 7150744 200 [ELPTO] 7200724 200 [EXLPTO] 7200744