Mercury / Tohatsu 9.8 & 9.9 HP EFI motors:

Prior to 2024, the 9.8 and 9.9 EFI was built with a 0.333 liter (333 cc) power head. In 2024, the displacement was changed to 0.209 liter (209 cc). The two power heads require different iTroll "Fit Kits", so identification is needed. There are three ways to identify which motor you have:

Method #1: By date of purchase or ownership:

Did you own or purchase your motor BEFORE 2024?

YES

If you answered "No" to the above question, continue with steps below.

Method #2: By Serial Number (Mercury Only)

Please make selection:

Serial number 1R008146 thru 1R278792

Serial Number 1R281146 and up

Note: Serial number sticker is located on transom clamp.

:

Method #3: By Engine Displacement

Determine your engine displacement removing cowl (lid) and by finding the emissions sticker. Please make selection:

Engine displacement .333 liter or 333 cc

Engine displacement .209 liter or 209 cc

   :

Method #4: By picture

Does your motor look like this picture? (Click on picture to enlarge.)

Yes, my engine looks like the picture.

No. My motor is different than the picture.



A) Throttle Body

B) Fuel Rail

C) Throttle Rod with ball fittings on each end