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SPM-HEP-4572 is the 12 V, 1.6 kW starter: a flange mounted reduction starter with a 15 tooth pinion and a solenoid with a blue lead. It is used on Yanmar 3TNB engines. This aftermarket version has the same mounting and electrical connector as the original, so it plugs in and bolts on where the old one came off.
It replaces Yanmar 129150-77010 and Yanmar S114-408.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Starter Motor |
| Replaces | Yanmar 129150-77010 |
| Voltage | 12 V |
| Power | 1.6 kW |
| Pinion | 15 teeth |
| Cross references | Yanmar S114-408 |
| Fits | Yanmar 3TNB80U, 3TNB82U and 3TNB84U engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 851140 |
| Country of Manufacture | China |
Yanmar machines
Check the part number on your old unit before ordering.
| Yanmar Part No.(SPM Part No.) | Fits |
|---|---|
| 129150-77010(SPM-HEP-4572) | Yanmar 3TNB80U, 3TNB82U and 3TNB84U engines |
| S114-408(SPM-HEP-4572) | Yanmar 3TNB80U, 3TNB82U and 3TNB84U engines |
What it does
The solenoid throws the pinion into the flywheel ring gear and the motor turns the engine over until it fires.
Where it is used
Made for the Yanmar 3TNB80U, 3TNB82U and 3TNB84U engines. The full list is in the tables above.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (2 aftermarket sellers) | USD 164.98 to 169.75 | 30 Oct 2026 |
| FridayParts | USD 182.14 | 30 Oct 2026 |
| Yem Parts | USD 215.76 | 2 Nov 2026 |
| SINOCMP | USD 249.00 | 30 Oct 2026 |
| Fab Heavy Parts | USD 257.64 | 2 Nov 2026 |
| Spare Part Mart | USD 131.98 | Today |
Our price of USD 131.98 is 20% to 49% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Yanmar 3TNB80U, and 2 more listed under compatible equipment. Check the old starter motor is marked 129150-77010 or one of the cross references, because makers change parts between serial ranges.
On the Yanmar 3TNB80U, typically 5,000 to 10,000 hours, depending on how often the machine is started and how well the batteries are kept.
Clicking with a good battery, slow cranking, grinding as it engages, or the starter staying engaged after the engine fires.
Battery voltage under load, the earth strap and the main cable. A weak supply makes a good starter motor look faulty and will burn out the new one.
Disconnect the battery earth before removing the old unit. The main cable is live at full battery current.
No. It is an aftermarket starter motor made to replace the Yanmar 129150-77010. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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