THE SHORT ANSWER
An older Steam walkthrough places an engine upgrade at the Forest shack beside the old man, with another on Desert. Read the current purchase prompt: its reported 230 price is from 1.0.4 and has not been rechecked in-game.
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Charlie Pork’s 1.0.4 walkthrough places the first boat-engine upgrade at the Forest shack beside the old man. It reports an in-game price of 230 and another engine on Desert. Those are historical shop details; current prices and stock have not been verified.
Reported guidance · Inspect source ↗Earn boat access first. At the Forest shack, read the engine purchase prompt and current price before buying. Compare the resulting boat equipment with the upgrade objective. Engine speeds, fuel behavior and restoration of a lost boat are not established here.
Kingy advice · Inspect source ↗
Check the result
The engine purchase is reflected in your boat equipment; check the Getting an upgrade objective.
If it goes wrong
If the reported shop or price differs, keep your money and record the purchase prompt and game version.
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Patch-impact review: 2026-10-12. Written instructions are sourced reports or labelled planning advice. Kingy has not play-tested this route.
Current shop landmark, engine name, price, purchase and resulting boat equipment.
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