No! If your riser has threaded components, we have loosely assembled it and test fitted the jacket using plastic zip ties. You must fully tighten all joints to match the angles necessary for your installation. Finally, re-install the Thermal Jacket using the provided stainless steel zip ties.

Like plastic zip ties, the stainless ties are designed for single use. Once the strap is inserted in the buckle, you can't back it out. If it is only latched at the end of the strap, the strap may be long enough to snip off the end and start over. Otherwise we do have extra straps available intended for purchase in two or three years when it's time to remove the jacket and inspect the riser. See 'May we also suggest" below.

When the sulfur which is in diesel fuel burns, it produces sulfur dioxide (SO₂), which further oxidizes to sulfur trioxide (SO₃). It then reacts with water vapor to form sulfuric acid (H₂SO₄). The sulfuric acid can corrode engine components and lead to increased wear and tear. Using ultra-low sulfur diesel (ULSD) significantly reduces the amount of sulfuric acid formed in diesel exhaust.  

Hose clamps in the engine room are also subject to corrosion in the marine environment. Inspect all clamps connecting hoses to your riser (and fuel system). Replace as needed. They are critical to safe operation as they help prevent leaks to reduce exposure to potentially lethal carbon monoxide as well as acid exposure of the external portions of the riser. High quality clamps like our Swedish made all type 316 stainless clamps are preferred. See below under "May we also suggest".

Risers are provided with a manufacturer’s limited warranty. The part must be returned to the manufacturer within 18 months of the date you purchased the riser for inspection. Repair or replacement will be at the manufacturer's discretion. 

Yes. A flexible silicone hump hose between your exhaust riser and muffler reduces the vibration transmitted from the engine to the muffler. It will extend the life of your muffler and reduce noise while motoring. We offer three different hump hoses to fit the majority of Catalinas. Always install a hump hose if your boat is not already equipped with one. 

Note: An occasional boat model/engine combination may use a longer reinforced hose (1.5' to 2') between the exhaust riser and the muffler (some Catalina 34's for example). In those instances the extra length of hose may make it sufficiently flexible to avoid damage to the muffler without the use of a hump hose. 

Once you have our reusable thermal jacket, it can be removed for inspection and reinstalled with our Exhaust Riser Thermal Jacket, Replacement Bands. If you need to purchase a replacement Exhaust Riser in the future, you may be able to re-use your original Thermal Jacket. Each Thermal Jacket is hand-made to fit a particular Exhaust Riser design.

Note: A proper fit is critical to the safe operation of your boat. To ensure safety, Exhaust Risers and Thermal Jackets are sold as a set. To purchase a replacement Exhaust Riser only, we must verify the part numbers of your original purchase of the Exhaust Riser and Thermal Jacket set. Without verification, only complete sets are available.

On rare occasions we may need to change the design of an Exhaust Riser. In that case your old Thermal Jacket wouldn't fit a new Exhaust Riser and woun't be able to be re-used.

We use anti-seize thread sealant compound during assembly. The remainder of the tube is included with your riser. Your mechanic may have added more if your configuration requires a threaded exhaust flange to connect to the engine. This compound is critical to prevent seizing of the stainless parts during assembly and for proper sealing. Excess compound can smoke and will eventually burn off after the break in period.