Optimax 225 Fuel Filter

[Nasher]

I'm getting everything place ready to fit the(Pre-Loved) 225 Optimax I've purchased to re-engine The Nashers revenge.
It's arriving with me later this week, but selfishly Lady Nasher wants me to fit the new kitchen that's also just arrived before swapping boat engines about

I realise that the Delphi 296 Pre-filter/water separator mounted in the boat that I've had in place for the old DT200EFI probably needs upgrading to something more sophisticated.

Does anyone have any suggestions?

I'd like to consider a twin filter and separator setup that gives the option to swap between the two if required.
It's hidden under the transom cover, so doesn't need to be pretty or particularly small.

Thanks

Nasher

Current, unsophisticated setup:

[Nasher]

Meant to say I'd rather have something with a clear lower bowl so i can see what's going on if there's any water in there.

The std Merc type one doesn't have a bowl, but I know Yamaha and Suzuki ones do.

Nasher

[GuyC]

https://www.asap-supplies.com/fuel-s...ansparent-bowl

They do petrol filters with clear bowls and they do dual and duplex but not all at the same time.

[Nasher]

Thanks GuyC

I've seen it suggested that the Optimax needs a 2 Micron Filter, 10 Micron isn't good enough, but I'm not sure if that's correct.

Nasher

[Westcoaster]

https://www.bottomlinemarine.com/pro...ine_4107.shtml

Believe these are for Optimax, it’s what I have anyway

[Westcoaster]

Don’t know much about the 225 optimax but my optimax the 2 micron filter is on the fuel vst would expect yours to be the same.

[Nasher]

Thanks Westcoaster, the Racor ones do appear to be the ones to go for.

I think 'reassuringly expensive' is the phrase I'm looking for.

I can't find anywhere what filter mercury recommend with regards to Particle size, but I've seen plenty of 10 Micron ones advertised as being for Modern Fuel injected Outboards.
Although I suppose the Optimax is not exactly modern these days, despite it being the most complicated Outboard I've ever owned.

Nasher.

[neil.mccrirrick]

I under you want a bowl you can see so this probably isn’t for you but this is what I am using and hand done for the last few years (not the same filter lol) works fine no hesitation in the throttle at any point

[Pikey Dave]

These[emoji106]

[Tim M]

THIS is what you need

You could easily set up two with suitable valves so you have a quick change-over

https://www.specialistsmallcraft.co....ter-with-drain

[CJL]

Remember that some Mercury engines has an accessory link to go to your water filter so the Smartcraft Gauges will alert you to water in your fuel. I think they will also put the engine into the Guardian mode to protect the engine.

If you wanna use this you will need the Racor fuel filters with the screw thread in the plastic bowl.

Chris

[Bjohnson]

This is an interesting topic - you have now prompted me to check what filter system i have on my boat next time i visit!!

I have a (new to me) 2004 Mercury 225 Optimax that came with my boat last year, so i'm learning fast about these engines. They are superb but clearly require a lot of care and very particular maintenance.

I found a USA forum (bbcboards.net) with a lot of very comprehensive advice on these motors, its worth a few hours of reading on points to watch, check, vital maintenance etc. and a service manual (not cheap) is essential if you want to look after most of it yourself.

[Nasher]

I'm still waiting for mine to arrive, then I have to fit it, but I've promised Lady Nasher I'll fit her new Kitchen first.

I am however trying to gather everything together so I'm not held up when I do fit it.

Nasher

[Bjohnson]

I have this set up on my rib, should i be considering changing to an alternative or an upgrade? Photo is rotated, not the actual install



I need to check the small print on the outer case, a quick Google search suggest this might be a 10 micron filter. but i dont know for certain (most likely).

I'll also now start looking to see if i can make a straight swap of the filter element for a 2 micron filter, retaining the housing i already have.

[matata]

We fitted a Racor 2 micron for our fuel injected 115 Yam. The filters in the injectors are 2 micron so the finer the filtration the better! It has a flow rate of 60 GPH so no probs there. seriel number Racor SUL3228sul...not cheap but job done. clear bowl underneath. Freely available in USA. Nik