Mercury/Mariner Powerhead Rebuild Kit - 2 Cylinder Mercosil 2-Stroke Carb Blocks
Item Description
Mercury / Mariner 2 Cylinder Powerhead Rebuild Kit
15 Marathon / 15 Marathon XD / 15 SeaPro / 15 SeaPro XD / 15 Super / 20 / 20 Jet / 20 Marathon / 20 SeaPro / 20 Tracker / 25 / 25 Marathon / 25 SeaPro / 25 Tracker - Mercosil Block Only
- Complete powerhead rebuild kit including cast pistons, rings, wrist pins, circlips, gasket kit, crankshaft bearings, rod bearings and rod bolts
- Kit is for 2-stroke carbureted models with Mercosil block only - "Mercosil" is cast onto the intake side of the top cylinder
- Will not work with chrome bore block
- Pistons are available in standard, 0.020", 0.030" or 0.040"
- Standard bore = 2.562"
- Please specify size of pistons when ordering
- Please check the application chart below for specific models this part fits - if you are not sure of your model please contact us with your engine serial number
Kit Contents
| Description | Replaces OEM Part Number |
Quantity In Kit |
| Piston & Wrist Pin | 821968A3 821968A5 879878A6 879878T5 767821968A3 767821968A5 767879878A6 767879878T5 767-821968A3 767-821968A5 767-879878A6 767-879878T5 |
2 |
| Piston Ring Set | 827491A12 18652A2 39827491A12 3918652A2 39-827491A12 39-18652A2 |
2 |
| Piston Circlip | 828119 40828119 40-828119 |
8 |
| Gasket Kit | 41499A84 41499A87 41499A88 2741499A84 2741499A87 2741499A88 27-41499A84 27-41499A87 27-41499A88 |
1 |
| Upper Main Crankshaft Bearing |
85114 85114T 3185114 3185114T 31-85114 31-85114T |
1 |
| Center Main Crankshaft Bearing |
86992A2 86992A3 86992A5 |
1 |
| Lower Main Crankshaft Bearing |
85113 85113T 3185113 3185113T 31-85113 31-85113T |
1 |
| Wrist Pin Bearing | 98295 2998295 29-98295 |
2 |
| Rod Bearing | 91866A1 41620A1 879877A1 3191866A1 3141620A1 31879877A1 31-91866A1 31-41620A1 31-879877A1 |
2 |
| Rod Bolt | 91012 1091012 10-91012 |
4 |
| Silicone Liquid Gasket Crankcase Sealer |
N/A | 1 |
Application Chart
| Engine HP / Model | Serial Number Range | Build Country | Note |
| 15 Marathon | 0G202750 - 0G437999 | USA |
Mercosil Block Only Exhaust Tube & Driveshaft Housing |
| 15 Marathon XD | 0G202750 - 0T979999 | USA | Mercosil Block Only |
| 15 SeaPro | 0G202750 - 0G437999 | USA |
Mercosil Block Only Exhaust Tube & Driveshaft Housing |
| 15 SeaPro XD | 0G202750 - 0T979999 | USA | Mercosil Block Only |
| 15 SeaPro XD | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 15 Super | 0G202750 - 0T979999 | USA | Mercosil Block Only |
| 15 Super | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 15 Super | 0P325500 & Up | Belgium | Mercosil Block Only |
| 20 | 0G202750 - 0T979999 | USA | Mercosil Block Only |
| 20 | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 20 | 0P325500 & Up | Belgium | Mercosil Block Only |
| 20 Jet | 0G202750 - 0T999999 | USA | Mercosil Block Only |
| 20 Jet | 1B000001 & Up | USA | Mercosil Block Only |
| 20 Jet | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 20 Jet | 0P325500 & Up | Belgium | Mercosil Block Only |
| 20 Marathon | 0G202750 - 0T979999 | USA | Mercosil Block Only |
| 20 Marathon | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 20 Marathon | 0P325500 & Up | Belgium | Mercosil Block Only |
| 20 SeaPro | 0G202750 - 0T979999 | USA | Mercosil Block Only |
| 20 SeaPro | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 20 SeaPro | 0P325500 & Up | Belgium | Mercosil Block Only |
| 20 Tracker | 0G202750 - 0T979999 | USA | Mercosil Block Only |
| 20 Tracker | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 20 Tracker | 0P325500 & Up | Belgium | Mercosil Block Only |
| 25 | 0G202750 - 0T999999 | USA | Mercosil Block Only |
| 25 | 1B000001 & Up | USA | Mercosil Block Only |
| 25 | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 25 | 0P325500 & Up | Belgium | Mercosil Block Only |
| 25 Marathon | 0G202750 - 0T999999 | USA | Mercosil Block Only |
| 25 Marathon | 1B000001 & Up | USA | Mercosil Block Only |
| 25 Marathon | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 25 Marathon | 0P325500 & Up | Belgium | Mercosil Block Only |
| 25 SeaPro | 0G202750 - 0T999999 | USA | Mercosil Block Only |
| 25 SeaPro | 1B000001 & Up | USA | Mercosil Block Only |
| 25 SeaPro | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 25 SeaPro | 0P325500 & Up | Belgium | Mercosil Block Only |
| 25 Tracker | 0G202750 - 0T999999 | USA | Mercosil Block Only |
| 25 Tracker | 1B000001 & Up | USA | Mercosil Block Only |
| 25 Tracker | 9855587 - 0P325499 | Belgium | Mercosil Block Only |
| 25 Tracker | 0P325500 & Up | Belgium | Mercosil Block Only |
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