Simrad IS35 Digital Instrument Display - Multifunction Engine Readouts

Our review of the Simrad IS35 Digital Display finds it best suited for boat owners and marine technicians who need a compact, networked readout of engine and vessel data. The IS35 excels at showing live engine metrics when connected to an NMEA2000 network or via a J1939 gateway, making it a practical choice for vessels that already use digital sensors. The main reason to buy is straightforward: it aggregates essential engine and system data onto five preconfigured pages so the operator can monitor key information quickly and reliably.

Key Features

• Multifunction instrument: Displays a variety of engine and vessel data on a single unit so users can access multiple parameters without switching devices.
• NMEA2000 network support: Integrates directly with NMEA2000 compatible engines and sensors to show live data from the onboard network.
• J1939 gateway compatibility: Can function as an engine display when paired with a J1939 to NMEA2000 converter, enabling use with many marine diesel and gas engines.
• Five preconfigured pages: Provides the most commonly used information in a ready-to-use layout, reducing setup time and simplifying routine monitoring.
• Automatic data hierarchy: Chooses which data to show based on available sensors, so the most relevant metrics appear without manual configuration.

Who It's For

The IS35 is aimed at recreational and small commercial vessel owners who want a straightforward engine and systems display that ties into an existing NMEA2000 network. It is helpful for anyone installing or upgrading instrument clusters who values a compact, multifunction display rather than a large chartplotter or full multifunction display.

Those who should look elsewhere include operators who need highly customizable large-screen navigation or integrated charting, and owners of boats without an NMEA2000 backbone who are unwilling to add a gateway or additional sensors to obtain meaningful data.

Pros & Cons

Pros

• Clear, focused readouts from a single multifunction instrument that reduce console clutter.
• Direct NMEA2000 integration means reliable live data from compatible engines and sensors on the network.
• Works with J1939 to NMEA2000 converters so it can serve as an engine display for many marine engines.

Cons

• Displays depend on available NMEA2000 sensors or added gateways, so boats without those systems get limited value.

Specifications

Product	IS35 Digital Display
Instrument Function	Multifunction
Network Compatibility	NMEA2000
Engine Interface	Via NMEA2000 or J1939 to NMEA2000 gateway
Display Pages	Five preconfigured pages
Data Selection	Automatic hierarchy based on available sensors

Our Verdict

The Simrad IS35 is a sensible, value-oriented choice for boat owners who need a dedicated engine and vessel data display on an NMEA2000 network. It is compact, easy to integrate with J1939 gateways when required, and its preconfigured pages make routine monitoring simple. Choose the IS35 when you want reliable engine readouts without replacing your whole electronics suite.

Frequently Asked Questions

Can the IS35 show engine data from older engines?
Yes, if the engine is connected via a compatible NMEA2000 gateway or a J1939 to NMEA2000 converter it can display the engine metrics available from that interface.

How many display pages does the IS35 have?
The unit comes with five preconfigured pages that present the most commonly used engine and vessel information.

Will it work without an NMEA2000 network?
The display needs data from NMEA2000 sensors or a gateway to show meaningful information, so it is limited on boats without that network unless additional converters are installed.