Yanmar 4TN98G
Series: TN-G Series
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Yanmar TN-G Series – industrial engines of the register: 4TN88G and 4TN98G, four-cylinder units from Yanmar's TN engine family for construction machinery, generator sets and stationary plant
The Yanmar TN-G Series brings together on this collective page two engines from the TN family: 4TN88G and 4TN98G, which according to the register run on LPG. Yanmar was founded in 1912 in Osaka and is one of the most long-established Japanese engine makers; in the type designation of the TN engine family, the leading digit denotes the number of cylinders, so both engines listed here are four-cylinder units, larger than the three- and two-cylinder versions of the same engine family.
Read on 3 more paragraphs
The register lists here two versions, 4TN88G and 4TN98G, with 44.2 to 63.0 kW or 60.1 to 85.7 hp at 2,500 to 2,600 rpm; displacement ranges from 2,190 to 3,318 cm³, dry weight from 175 to 240 kg. Both are water-cooled, naturally aspirated four-cylinder gas engines meeting the EPA Tier 2, CARB (Off-Road LSI) and EU Stage V emission standards.
Four-cylinder gas engines like the TN-G range are used in generator sets, forklifts and other equipment, where the CARB classification as a Large Spark-Ignition engine favours low-emission operation indoors or in enclosed halls; Yanmar's TN engine family, in its diesel-fuelled versions, otherwise covers a broad field of application from construction machinery to stationary industrial plant.
When buying used, what counts on these four-cylinder gas engines is compression and oil consumption, the tightness of the cooling system, and the condition of the ignition system and gas mixer; rough idling often points to uneven compression across the cylinders or an incorrectly set gas mixture. Spare parts run through Yanmar's industrial engine distribution.
Sources: SpecCodex register, model data: Yanmar TN-G Series, Yanmar (manufacturer)
Technical data
Engine
| Fuel | LPG (Fluessiggas)correct |
|---|---|
| Power | 85.7 hp (63 kW)correct |
| Cylinders | 4correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Dry weight | 240 kgcorrect |
|---|
Other data
| Aspiration | naturally aspiratedcorrect |
|---|---|
| Bore × stroke | 98x110correct |
| Dimensions | 725x577x796correct |
| Displacement | 3,318 lcorrect |
| Emission stage | EPA Tier 2 / CARB (Off-road LSI) / EU Stage Vcorrect |
| Speed | 2,500 rpmcorrect |
Frequently asked questions
How much power does the Yanmar 4TN98G have?
The Yanmar 4TN98G delivers 85.7 hp.
What engine does the Yanmar 4TN98G have?
4 cylinders, LPG (Fluessiggas).
What to check before buying
- Match the data plate against the order: frame size, mounting and rating have to agree.
- For used units, ask about winding condition and bearing play.
- Ask about parts availability for this series — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 12 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: [1]
Diesel engine in 3D section
Turn the model, look inside and click an assembly — each one is explained.