154236-9121 ZEXEL 9 421 614 167 BOSCH TENSIONING LEVER 9421614167 1542369121 8970310620

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.Before proceeding with this maintenance interval, perform previous maintenance intervals and Daily maintenance requirements. Perform the maintenance at the interval listed in the Maintenance Schedule for your engine.
For maintenance of the following components in this interval, refer to the OEM manual for maintenance instructions. The following are basic suggestions and instructions.
Marine Gear
Drain Oil
With the oil warm and the engine stopped, drain the transmission.1. Remove the transmission drain plug and allow the oil to drain. Obtain an oil sample for analysis.2. Clean and install the drain plug.If a Sump Pump is Used to Drain Oil
a. Connect a drain line and container to top outlet (A) of pump.b. Be sure valve (B) on the engine oil pan line is closed. Marks on the valve must be turned at right angles to the direction of the engine oil line. c. Open valve (C) on the transmission oil line. The marks on this valve must be turned so that one mark points to the pump and the second mark points to the transmission.d. Operate the sump pump (D) handle until the transmission is empty.e. Close the sump pump valve on the oil line to the transmission.Change Filters
1. Remove transmission oil filter housing drain plug (if equipped). Allow the oil to drain into the marine gear transmission sump.2. Remove filter assembly. Disassemble and discard the element.3. Clean the filter housing and assembly parts with clean, nonflammable solvent. Clean and install the filter housing drain plug.4. Inspect any retainer plates and/or seals. Install new seals if necessary.5. Assemble and install a new filter element assembly. Tighten all bolts.6. Operate the sump pump handle until the transmission is empty. Close the sump pump valve on the oil line to the transmission.Clean the Oil Strainer
1. Remove the strainer cover and plug. Remove the spring washer, strainer screen and magnetic screen tube (if equipped).2. Wash the strainer and magnetic screen tube with clean, nonflammable solvent. If a magnet is broken, install the new magnet properly. The North (N) poles and South (S) poles of the magnets are adjacent to each other so that they repel instead of attract: S-N, N-S, S-N.3. Inspect the strainer, plug and the cover seal for damage. Use new parts if used ones are damaged.4. Install the magnetic screen tube, strainer, spring washer, seal, cover and plug.Clean the Breather (All Marine Transmissions)
1. Remove the breather.2. Clean the breather with clean, nonflammable solvent.3. Install the breather.Fill the Transmission
Be sure both sump pump valves (one to the transmission and one to the engine oil pan) are closed. Otherwise a transfer of oil may occur during sump pump operation and damage could result.
1. Be sure the marine gear drain plug has been installed, or the sump pump valve (C) on the oil line to the marine gear drain line has been closed.2. Fill the marine gear to the FULL mark on the