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Tune Up Kit Thunderbolt Big Block Tri-Pak | United Marine 1-102

Tune Up Kit Thunderbolt Big Block Tri-Pak | United Marine 1-102

United Marine

$101.99 USD
$145.65 USD $101.99 USD
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Tune Up Kit Thunderbolt Big Block Tri-Pak | United Marine 1-102

Tune Up Kit Thunderbolt Big Block Tri-Pak | United Marine 1-102

Keep your Mercruiser big block running at peak performance with this essential three-piece tune up solution. The kit delivers everything needed for a complete ignition system refresh—distributor cap, rotor, and spark plug wires—all engineered specifically for Thunderbolt distributors. Quality components ensure reliable starts, smooth operation, and extended engine life. Trust United Marine's proven formula for marine engine maintenance.

  • Kit fits Mercruiser V8 454, 502, 540, and 572 cubic inch engines with Thunderbolt ignition systems
  • Includes MEGA-MAG 8mm SSC silicone spark plug wire set, heavy-duty distributor cap and rotor with brass contacts, dielectric silicone grease, and wire separators
  • Ignition coil wire included
  • Wire set has 90 degree boots on each end
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Let customers speak for us

from 82 reviews
Would have been 5 stars but....

Would have been 5 stars but, I did not receive a promotional sticker with my $2000 drive unit. Just kidding, everything was great!

William S.
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Great company to work with!

Tom B.
Gasket Exhaust Elbow 3 Hole | Crusader 96108

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.

Alexiel M.
Piranha Propellers Complete A-Series 4 Blade Propeller

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Randolph D.
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Excellent part.

Nelson R.
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Piranha Propeller

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.

S.S.
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Perfect replacement. thank you

MICHAEL W.
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Perfect replacement

Michael K.
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Perfect match

Perfect match to the original Chris Craft blue. Competitive price and delivery was quick

jason b.
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Great Product

Great Product, easy to install, work well

Kevin M.
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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.

Paul B.
Volvo Penta Magnesium Transom Shield Anode | Martyr CM3854130M

Black Liquid Electrical Tape - 4 oz. | Star Brite 084104B

JEFFREY K.
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As described

Jonathan C.
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Very Happy!! Just what I needed!!

Peter B.
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Quality seems good

Outdrive spent 4 months docked in salt water with no visible rust on the stainless steel braided hoses

Thurman W.
Hose Kit For Alpha One (16-3/16" & Gen II) | SEI 9B-106A