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Sierra
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Tune Up Kit GM V8 HVS | Sierra 18-5247
Keep your late-model GM V8 running at peak performance with the Sierra 18-5247 Tune-Up Kit, engineered specifically for engines equipped with HVS distributors. This comprehensive kit delivers the maintenance essentials your engine needs to maintain reliability and smooth operation.
Maintaining a boat engine requires the right parts for consistent reliability. Consequently, the Tune Up Kit GM V8 HVS | Sierra 18-5247 is a top choice for boaters. This kit is specifically designed for late-model GM V8 engines. Furthermore, it ensures your ignition system operates at peak efficiency. Since marine environments are harsh, you need components that can withstand moisture and heat. Therefore, choosing a high-quality tune-up kit is a smart investment for every owner.
This kit includes a high-grade distributor cap and a matching rotor. Specifically, these parts fit the Delco HVS V-8 distributors found on many modern vessels. Because the cap features female/socket terminals, it provides a very secure connection. Additionally, the screw-down attachment style prevents the cap from loosening during high-speed operation. Thus, you can enjoy a stable spark and better fuel economy on the water.
Compatibility is vital when you are purchasing ignition parts for your boat. Fortunately, the Sierra 18-5247 fits several popular Mercruiser and Volvo Penta applications. For instance, it works perfectly with 350 Mag, 5.0L, 5.7L, and 6.2L MPI engines. Moreover, it is designed for engines with the ECM 555 and serial numbers 0M300000 and up. Because it replaces Mercury 898253T29 and Mallory 9-29318, you can trust its fitment. Always verify your serial number before you start your maintenance project.
Sierra is a leader in the marine industry for several important reasons. First, their products meet or even exceed the original equipment specifications. Second, this tune-up kit is engineered for the unique demands of saltwater and freshwater use. Because the materials are corrosion-resistant, they last much longer than standard automotive parts. Additionally, Sierra backs this kit with a limited lifetime warranty for your peace of mind. As a result, you get professional-grade quality at a competitive price point.
You do not need to be a professional mechanic to install this kit. However, you should use the correct tools like a Torx T-15 or T-20 screwdriver. Since the original screws often have thread locker on them, you must remove them carefully. Once the old cap is off, simply swap the rotor and secure the new cap. Afterward, your engine will start more easily and run much smoother. Finally, regular maintenance with this kit helps you avoid expensive repairs in the future.

Would have been 5 stars but, I did not receive a promotional sticker with my $2000 drive unit. Just kidding, everything was great!
Great company to work with!
Ordered a Piranha Propellers Complete A-Series 4 Blade Propeller from Macomb Marine Parts and even though we’re international, it arrived in just over a week — fast and reliable service. The propeller itself is a real lifesaver. We had the same model before, and after hitting a rock that damaged two blades, we were able to swap them right on the water and make it back to the marina without issue — something you simply can’t do with a regular aluminum prop. For peace of mind we decided to buy a complete new set (hub and blades) since an impact like that could cause hidden damage, but the system really proved its worth.
3 in. Exhaust Elbow | Pleasurecraft R029001
Excellent part.
I couldn’t find a Piranha propeller dealer near me in Canada but found Macomb Marine Parts who could deliver to me. The order process was smooth and I was even contacted via email for clarification regarding blade shape and they were very helpful in choosing the best shape for my purposes.
I can’t comment on the prop’s performance yet as we haven’t had the boat in the water yet.
Perfect replacement. thank you
Perfect replacement
Perfect match to the original Chris Craft blue. Competitive price and delivery was quick
Great Product, easy to install, work well
Obtaining magnesium anodes to install on the OMC Cobra (SX-C) sterndrive, for fresh water use. Received the anode within a week of ordering the part, which is not going to be installed until Spring.
Black Liquid Electrical Tape - 4 oz. | Star Brite 084104B
As described
Very Happy!! Just what I needed!!
Outdrive spent 4 months docked in salt water with no visible rust on the stainless steel braided hoses
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Would have been 5 stars but, I did not receive a promotional sticker with my $2000 drive unit. Just kidding, everything was great!
Great company to work with!
Ordered a Piranha Propellers Complete A-Series 4 Blade Propeller from Macomb Marine Parts and even though we’re international, it arrived in just over a week — fast and reliable service. The propeller itself is a real lifesaver. We had the same model before, and after hitting a rock that damaged two blades, we were able to swap them right on the water and make it back to the marina without issue — something you simply can’t do with a regular aluminum prop. For peace of mind we decided to buy a complete new set (hub and blades) since an impact like that could cause hidden damage, but the system really proved its worth.