I saw "portable" in your request, so I would recommend a Weber Q2000. It cooks evenly, and is easy to clean and store.
But..... it's not marine, it's not stainless, and does not have a boat mount. So probably not a consideration for you. I am not a fan of
open flame and attached grill to a boat, no matter how safe your grill location is. But I understand that not always can you carry a grill to the beach to cook a meal. We always grilled off the boat, and I never cook on gas, but have used a Weber Q many times (borrowed from Dad)at tailgate parties and camping.
So you are probably fine with just replacing the Dickinson, a Kuuma Stow n Go 160 is also nice.. Best stainless marine portable/gas (if you like infared cooking) grill, my recommendation would be.......
The Solaire SOL-IR17M.
http://www.air-n-water.com/product/sol-ir17m.htmYou can get a
mount/adapter plate for it that is compatible with regular Magma grill mounts. The latches that secure the top, and carry bag are nice features too. But, she is a pricey one
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One of 4 Previous (Sold) Boats:2000 Four Winns 268 VistaCurrent Boat: 2004 Chaparral
235 ssi cuddy