SILENT LOCK KIT 73326

Function and technical context

The top mount silemblock kit is an essential component of the suspension and damping system of Mercury and MerCruiser marine engines. This set of rubber insulators with metal reinforcement acts as an elastic fixing element between the engine and the structure of the boat, absorbing the vibrations generated by the combustion and operation of the propeller. Its correct installation guarantees a minimum transmission of vibrations to the hull, which protects the structural integrity of the boat, reduces noise in the cabin and prevents premature wear of adjacent components. The included stainless steel washers ensure even load distribution and optimal corrosion resistance in the saline marine environment.

When to replace this part?

Symptoms of silemblock wear include a noticeable increase in vibrations in the cabin, metallic noise when accelerating, excessive engine movement under load and visible deterioration of the rubber (cracks, permanent deformation or separation of the metal core). It is recommended to inspect these components at each seasonal inspection and replace them if they show physical damage, hardening of the rubber or loss of elasticity, since a defective silemblock compromises the safety of the engine mounting and can cause costly secondary breakdowns. Preventive replacement before the intensive sailing season prevents emergency repairs at sea and ensures smooth operation of the propeller.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers