[99 Mariah 258]

Hello everybody .......Bought my first boat last week ..1999 258 Shabah. This boat is amazing. I stole it at auction on ebay .i.It has 200hrs.Anyhow.....need some help finding the fill for the fresh water washdown or is I this a raw water washdown..Any help would be appreciated. I have the original owners manual but despite the fact it's the size of the yellow pages it doesn't say.........also.....does anyone know the part number for the fuel filter and/or steps for replacement..Thanks brothers & sisters......

[ShabahZ280]

Congrats on the new boat! As for the washdown, are you referring to the shower fixture mounted on the transom by the swim deck? Unless you've got a freshwater holding tank, (which you'd be able to see in your engine bay, they're big and made from aluminum), it's most likely a raw water draw, meaning there's a seacock and a hose in the bilge somewhere that hooks to the water pump that feeds the shower.

If you're referring to the fuel/water separator, it's mercruiser part number 35-802893. It's a spin-on filter much like an oil filter, and it's located on the lower half of the 7.4L MPI block on the starboard side (near the motor mount). They're a bit tricky to replace, but I had really good luck with one of these $3 tools from Walmart.

Just take your time, and make sure and put some sort of bucket/catch container down below it before removing the filter completely, without a doubt, you'll spill a little gas.

[99 Mariah 258]

Thanks for the response.....I didn't see any tank so it probably is raw water .......thanks for the info on the filter......