{"product_id":"busidn-3-hp-9-tooth-mini-starter-for-chevrolet-153-168-tooth-flywheels-osgr-3-75-1-reduction","title":"BUSIDN 3 HP 9‑Tooth Mini Starter for Chevrolet 153\/168‑Tooth Flywheels — OSGR, 3.75:1 Reduction","description":"\u003cp\u003e\u003cstrong\u003eBUSIDN's 3 HP 9-tooth mini starter is a compact, high-torque replacement designed to crank Chevrolet small- and big-block V6\/V8 engines with 153- or 168-tooth flywheels.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis mid-size, gear-reduction starter delivers 3.0 horsepower with a 3.75:1 reduction ratio and a durable cast-aluminum housing. Built to replace common OEM and aftermarket part numbers (JM7001R, JM7001BK, 18493N, PP106, PE106 and others), it suits a wide range of Chevy engines from 262 to 454 cubic inches. The unit features a 9-tooth OSGR pinion (0.988 in \/ 25.1 mm gear OD), standard clockwise rotation (CW), and an adjustable billet-aluminum mounting block for fitment flexibility.\u003c\/p\u003e\n\n\u003ch3\u003eWill this starter fit my Chevrolet engine and flywheel?\u003c\/h3\u003e\n\u003cp\u003eYes—this starter is engineered for many Chevrolet small- and big-block V6 and V8 engines using 153- or 168-tooth flywheels, for either automatic or manual transmissions. Confirm your engine family and tooth count before ordering to ensure compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Chevrolet 262–454 CID engines, including Big Block 396–454 and Small Block 262–350 series.\u003c\/li\u003e\n  \u003cli\u003eCompatible with 153-tooth and 168-tooth flywheels\/flexplates.\u003c\/li\u003e\n  \u003cli\u003eWorks with both AT (automatic) and MT (manual) transmissions.\u003c\/li\u003e\n  \u003cli\u003eAdjustable mounting block helps adapt to mid-size starter locations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the gear reduction and torque translate to starting performance?\u003c\/h3\u003e\n\u003cp\u003eThe 3.75:1 gear reduction multiplies motor torque to the pinion, enabling stronger cranking current from a compact motor. That means faster, more reliable engine turnover under higher compression ratios up to the rated 11.0:1, without the bulk of full-size starters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3.0 HP (2.0 kW) motor for improved cranking power.\u003c\/li\u003e\n  \u003cli\u003e3.75:1 reduction ratio increases output torque to the 9-tooth pinion.\u003c\/li\u003e\n  \u003cli\u003eRated for engines with compression ratios up to 11.0:1.\u003c\/li\u003e\n  \u003cli\u003eOSGR design provides quick engagement and smoother starts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and build details affect durability and installation?\u003c\/h3\u003e\n\u003cp\u003eThe starter housing is cast aluminum for strength while keeping weight down; the mounting block is billet aluminum for precise alignment and corrosion resistance. The adjustable mounting block helps installers achieve the correct pinion-to-ring gear mesh, but professional installation is recommended to set the gap properly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCast-aluminum housing reduces weight and resists corrosion.\u003c\/li\u003e\n  \u003cli\u003eBillet-aluminum adjustable mounting block for secure fitment.\u003c\/li\u003e\n  \u003cli\u003eStandard CW rotation matches most Chevy starter requirements.\u003c\/li\u003e\n  \u003cli\u003eInstructions are not included—professional installation suggested.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich part numbers and replacements does this unit cover?\u003c\/h3\u003e\n\u003cp\u003eThis BUSIDN starter replaces many common OEM and aftermarket references, simplifying sourcing when rebuilding or upgrading classic Chevy engines. Cross-reference your existing part number with the listed alternatives before purchasing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon replacement part numbers: JM7001R, JM7001BK, 18493N, PP106, PE106.\u003c\/li\u003e\n  \u003cli\u003eAdditional references: 91-25-1201, 18493S1936N, 244-1603, 76012GHDN, 76012GHD, 4N1603.\u003c\/li\u003e\n  \u003cli\u003eSpecification label: 12V, 9-tooth, OSGR, 0.988 in (25.1 mm) gear OD.\u003c\/li\u003e\n  \u003cli\u003eMid-size starter style for a wide range of classic Chevy applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Enthusiasts and mechanics restoring, rebuilding, or upgrading Chevrolet small- and big-block V6\/V8 engines who need a compact, high-torque starter that fits 153- or 168-tooth flywheels. It's suitable for race-prep builds, street restorations, and projects where space, weight, and reliable cranking matter. If you lack installation experience, have a shop or professional technician mount and set the starter to ensure correct gear mesh and electrical hookup.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this starter handle high-compression Chevy engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The unit is rated for up to an 11.0:1 compression ratio and uses a 3.75:1 gear reduction for higher cranking torque.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does it fit both 153-tooth and 168-tooth flywheels?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It's designed to work with either 153- or 168-tooth flywheels on compatible Chevy V6 and V8 engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BUSIDN","offers":[{"title":"Default Title","offer_id":48082878922910,"sku":"B09TNM4CMX","price":139.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/busidn-front-view-mini-starter.jpg?v=1785817667","url":"https:\/\/northtrailauto.ca\/products\/busidn-3-hp-9-tooth-mini-starter-for-chevrolet-153-168-tooth-flywheels-osgr-3-75-1-reduction","provider":"North Trail Auto","version":"1.0","type":"link"}