CYLINDER HEAD PORT 135-175 HP MERCURY 2 STROKE 858281T2 (MER56). This product data sheet is originally written in English. This is a used part so it may have some scratches and show signs of use. I inspect all parts I sell to insure that they are in good condition. Some parts may need to be cleaned. Sometimes things happen and something slips by. MOTOR – 2003 Mercury 150 HP 2 Stroke – 0T648087 – 150XL SWB. PART – Cylinder Head Port side – The head is the same on both sides, just has a different water outlet and temp sensor. PART NUMBER – 858281T2. This part will fit other Mercury outboard engines. Check part numbers and the pictures and verify that it will fit your engine before ordering. If you have any questions message me and I will respond as soon as I can. PART – Cylinder Head Port side – The head is the same on both sides, just has a different water outlet and temp sensor This part will fit other Mercury outboard engines.