If he is a calling station, and pay bets whit second, or third pair, or pay high bets only whit draws, excludind the odds
, u need to be more tigher. You will be happy to play whit him when u have a good hand. U can raise pre flop 4,5x whit him because he will pay. ( the donks dont understands sizes, pre flops, and another sizes on another streets) so u can value bet a litle more higher, like 70% pot. The donks are nice to extract value, and horrible to bluf, try bluff whit they its a bad idea, usually they never fold.
Anyway, the best option is u be tigher, folding bad hands, and observing how he play, whats the sizes he does, and this things, somes bet pot whit value, and somes bet pot bluffing, or otherwise, bet too low, like 10, 20% pot whit value, or bluffing, u need observe him and make notes to be able to extract always more value of him.
Hope help gg on tables