Mercury MerCruiser 4.3 TKS MPI 2013-2018 Service Manual

TradeABoat's own long-view review is refreshingly candid about this engine's origins: "the MerCruiser 4.3L has been around since the sixties, when it was installed in a front-wheel-drive Oldsmobile. The engine soldiers on in marine form and has been incredibly popular... compared to low-emission petrol outboards of the same output, the 4.3L seems positively primitive. But it has simple engineering that's hard to kill, even with minimum maintenance."

Power comes from a 262 cubic-inch (4.3L) 90-degree V6, a genuine V6 derivative of MerCruiser's long-running 350ci (5.7L) V8, with a 101.6mm x 88.4mm oversquare bore and stroke and a 9.4:1 compression ratio, fed through Multi-Point Electronic Fuel Injection (MPI) via a two-piece long-runner intake with a 75mm throttle body, delivering a claimed 220 hp propshaft output at 4,600 rpm within a 4,400-4,800 rpm wide-open-throttle range. The "TKS" designation in your listing refers specifically to the carbureted 190hp version of this same 4.3L block — Boating Mag's own confirmed comparison lists "MerCruiser 4.3 TKS - 262 cid - 190 hp" running alongside the fuel-injected MPI variant at 220hp, both sharing the identical fundamental engine architecture.

TradeABoat's own confirmed account details a real, tangible advantage the MPI system delivers over the older two-barrel carbureted setup: "the MPI version... pumps out 15 per cent more power than the old two-barrel carbie version." Focus Marine's own confirmed spec sheet for the 220hp MPI variant lists a crank-fired high-voltage ignition system with knock control, a 65-amp/917-watt alternator driven by a serpentine belt (also running the power steering and cooling water pumps), and dual oxygen sensors managed through Mercury's PCM 09 engine control system with SmartCraft CAN capability and OBD-M diagnostics.

Jimmy's Marine's own confirmed product copy notes genuine durability engineering built into the whole block: a cast-iron block, closed freshwater cooling system, MercFusion electro-deposition paint process, and — standard on Bravo drives — Mercury's active MerCathode cathodic anti-corrosion system, with hardcoat-anodized SeaCore protection available as a further upgrade. TradeABoat's own confirmed drive-leg compatibility notes this engine pairs with everything from the Alpha through the Bravo 3, though for twin installations the reviewer flags the Bravo 3's dual-prop setup as genuine "overkill" that sacrifices the classic one-ahead/one-astern turning technique smaller drives allow.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2013-2018 Mercury MerCruiser 4.3 TKS MPI running the way it was built to.