Lower Unit fill screw and Vent screw

[521rangerman]

Hello,


MERCURY 3.0 LITER 250XS OPTIMAX DFI V6 2-STROKE
SN-0T652483
ProXS has a Gen-2 Torquemaster Gearcase, with a 1.25" diameter propshaft.


Trying to find part number for
Fill Screw-
Vent Screw-
Washer-
Not sure if takes blue or Yellow washer.Currently has the Yellow washer.
Want to make sure that is the correct washer.


Also how do you make sure it get the screws tight enough.
Thank You!
Tony

[Bob G.]

Blue or yellow seals are ok. The yellow ones are the newest and are easier to take off in my opinion.

Send Rhonda at European Marine an email for part quotes or look at the parts list by serial number at European Marine’s website.

[SilverFox579]

If the vent screw sealing surface on the lower unit is smooth, yellow, if not, fiber (blue).

[521rangerman]

Sent Rhonda at European Marine an e-mail.
Thanks

[EuropeanAM]

BTW- this engine should NEVER be equipped with a Gen-2 TM Gearcase for SAFETY REASONS.

[521rangerman]

How do you tell if this is a Gen2? Mercury had replaced LU in March of 2019.I know it has the larger shaft 1.25"
Thanks

[EuropeanAM]

Gen-2 is Silver, and has a small "wing" (fin) that starts in front of the gearcase, running almost to the side water inlets.

[521rangerman]

Lower Unit 10-14-2022.jpg
Here is a pic of my lower Unit.

[Chris85]

Looks like gen 1

[JOE54]

GEN ONE no small wing

[521rangerman]

Thanks JOE54

[Binder]

So, what is the recommended sealing washer to use? I'm not sure we ever really answered that question.

[Bob G.]

See post #3.

[EuropeanAM]

830749 (in process of superseding to 8M0204693 (Yellow)

Can also use 191833 if the surfaces are not "perfect" (Blue/Fiber)

[Binder]

Thank You