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Helpful Installation Tips
1. When loosening the 4 water pump bolts, leave the existing belt in place and THEN undo the bolts. This way you can use the belt to stop the W/P pulley spinning.
2. Check that the threads in the existing crankshaft pulley have not rusted. We find in most cases a little grease on our bolts clean the threads out if you carefully put them in half a turn and back. Alternatively you can use the correct thread chase (typically metric).
These popular Yanmar Marine engines, and all other engines operate much smoother, quieter and virtually eliminate belt dust with a serpentine upgrade kit.
An additional benefit of an Electromaax Serpentine kit is in it’s ability to drive auxiliary devices such as: Seafrost refrigeration, an engine driven water maker, a second alternator, a compressor – with the addition of a second crankshaft pulley. Contact us for further details
You can now safely operate the Electromaax SM-12-80, 100, 120 or 140 amp marine alternators that produce up to 70% of their output at fast idle. Our SM-12-160 amp unit will also work too. | 
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