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225XL optimax 2004 0T847960

Is there any classification or summary of compatible serial numbers for parts between outboards?

have an opportunity to acquire a used whole trim/tilt assembly...

Had failed, no idea why. My mechanic had pinpointed the likely fault to either the cps or ecu. Purchased a replacement cps first and this immediately resolved the problem.

494306225 optimax 2004. 0T847960

is there a Mercury/Mariner wiring harness to run from the main outboard engine harness multi pin connector to the console/helm position at the front of the boat?
...

Starting problem resolved. Was the crank position sensor. Thanks for the pointers

Yes, ignition on and hear the standard beep, plus can hear the fuel pump priming

2004 optimax 0T847960

my optimax wont start, looking for any pointers.

ran 2 weeks ago and always starts with first turn of the key. Has 125 hours and only just gone back in the water after...

Thanks for relieving the initial anxiety.

I figured as its a 2-stroke it was unlikely, but wasnt sure if there was some pressure reading for the oil supply system and couldn’t remember from use...

2004 Mercury Optimax 225 - 0T847960

my boat has been out of the water since last season and in that time the outboard has been removed for some work on the transom. Having first run a week ago...

Thanks for the clarifications. I had read and incorrectly interpreted that was linked to the external fuel/water separator and filter.

Hi

OT847960 2004 225XL Optimax

is there a recommended frequency for replacement of the VST fuel filter? I replaced last year (as I didn’t know when it was past replaced) but didn’t see it...

Hi,

2004 225 optimax 0T847960.

i last used my boat in early September, wasn’t sure back then when I’d get my last outing. Had planned to winterise the outboard in october, but had a call from...

Perfect. As I suspected. Thank you.

Hi all

2004 Optimax 225 (OT847960)

i need to replace the rigging hose to my engine. Just checking, but can i disconnect the oil hose at the outboard and then reconnect, followed by bleeding the...

2004 225 Optimax (0T847960)

Compressor failure seems to be one of the key worries with these engines. Ive noted there are always one or two available on <Read Announcements, Please> and just...

Thanks, that was my next thought/question! I'll probably therefore do most of the winter jobs/servicing and then get my local dealer to change these and do the oil pump priming.

Thanks. I’ll replace them as part of my winter maintenance

Hi, Mercury 225 optimax 2004 (0T847960)

is there a recommended frequency for replacement of the three inline oil filters on this engine? (Two inline filters on the lines to the compressor, one...

Thanks both. Good to check

I have a 225 optimax (Model year 2004, serial 0T847960). Had the boat just under a year and the provenance of the outboard is unknown.

Was inspecting yesterday and noted a reasonable amount of oil...

OT847960 - 2004 225 Saltwater

I have the common corrosion issues with the trim motor casing on my motor. I've been thinking of removing it and applying a cerakote finish to try and gain some...

Thanks for the helpful replies so far. i still have a lot i want to learn about this engine and looking after it, but starting to find my way around it now. I've had a further read of the...

Hi all,

new to this great forum, there’s such a lot of really useful info on here for these engines.

I bought a new rib last august with a 2004 225 optimax. I’ve only used the boat a handful...