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Alternators

Some alternators are grounded through the mounting bracket so be sure to clean the mounting surface of any paint, rust or corrosion.

Note: Alternators are bi-rotational & work for right hand or left hand rotations and it is not recommended to paint your replacement

Fun Facts: Marine versus Automotive Alternator

Fuel-efficiency via weight reduction is a primary goal for automotive design. Thus, modern vehicle alternators are made from lighter materials, sized for small batteries and minimal electrical loads. They will not sustain high loads without external airflow for cooling.

Industrial alternator applications require continuous-duty, high-output alternators built to last while operating safely. Marine alternators, for instance, have higher power demands than regular cars and trucks to run lights, radio transceivers, navigating equipment, AC/DC inverters, water makers, pumps, winches and other high-amperage devices. 

Additionally, marine engines are often installed in enclosed compartments to shelter them from moisture and salt spray. This means that marine alternators must be self-cooling at high loads or have an additional cooling subsystem. Marine alternators also comply with strict safety specifications not required of cars.

Marine Alternator Features

In order to meet these demands, alternators built for marine use have features not found in automotive-grade units:

  • Spark screens that meet U.S. Coast Guard standards to eliminate the alternator as an ignition source
  • Double-insulation to eliminate electrical shock in wet conditions and prevent sparks
  • Dual fans and large heat sinks for self-cooling under high, continuous loads
  • Stainless steel bearings, corrosion-resistant metals and heavy-duty coatings
  • High output at low RPMs to match marine diesel engine operating conditions
  • Battery sensing regulators for high-efficiency battery charging and detection of battery cell failure.
    ALTERNATOR 100 AMP PCM MARINE 5.7L - 6.0L WITH 6 GROOVE PULLEY OEM RA097009
    13%
    $304.95 $351.48
    100 Amp 12 Volt Original PCM Alternator with 6 Groove Pulley PCM Alternator 100A for most  5.7L and 6.0L engines OEM Not Aftermarket! PCM Part...
    ALTERNATOR 55 AMP INTERNAL REGULATOR GM YELLOW LEAD PCM AND INDMAR <b>1/2"</b> V-BELT PULLEY ALTERNATOR 55 AMP INTERNAL REGULATOR GM YELLOW LEAD PCM AND INDMAR <b>1/2"</b> V-BELT PULLEY
    13%
    $220.95 $254.23
    GM Alternator 55 Amp 12 volt with yellow lead RA097006A Replaces the old 51 Amp Style Alternator with a 1/2" pulley! Replaces 51 Amp Up...
    ALTERNATOR 55 AMP INTERNAL REGULATOR YELLOW LEAD PCM AND INDMAR <b>3/8" </b>V-BELT PULLEY ALTERNATOR 55 AMP INTERNAL REGULATOR YELLOW LEAD PCM AND INDMAR <b>3/8" </b>V-BELT PULLEY
    10%
    $239.95 $265.39
    Alternator 55 Amp 12 volt with yellow lead - RA097006 Replaces the old 51 Amp Style Alternator with a 3/8" pulley! Replaces Indmar 75-5024 &...
    ALTERNATOR 70 AMP 5.7L DELCO-BOSCH-6.0L FACTORY ORIGINAL PCM - INDMAR
    7%
    $309.47 $331.98
    New 70 Amp Delco Style Marine Alternator With Serpentine Belt Pulley Fits 2004 & Prior PCM - Most PCM 2005 and up had a 100...
    ALTERNATOR 70 AMP DELCO REMY STYLE INBOARD ALTERNATOR OEM ARCO 20825 ALTERNATOR 70 AMP DELCO REMY STYLE INBOARD ALTERNATOR OEM ARCO 20825
    14%
    $239.05 $276.64
    Late model 70 amp Delco Remy style alternator with 2 in. mounting foot and single V-Groove pulley fits various marine engines. New 70 amp 12...
    ALTERNATOR 70 AMP DELCO V-BELT PULLEY PCM - INDMAR OEM ALTERNATOR 70 AMP DELCO V-BELT PULLEY PCM - INDMAR OEM
    31%
    $269.07 $389.95
    OEM Delco Style 70 Amp Alternator With a V-Belt Pulley ORIGINAL INDMAR! Indmar and GM marine engine applications If you need alternator with serpentine belt...
    ALTERNATOR 75 AMP UPGRADE INDMAR LT1 - LTR REPLACES 55 AMPS WITH 75 AMPS ALTERNATOR 75 AMP UPGRADE INDMAR LT1 - LTR REPLACES 55 AMPS WITH 75 AMPS
    3%
    $284.05 $292.39
    Mando 75 amp marine alternator with 2 in. mounting foot and 6 groove serpentine pulley Fits Mercruiser marine engines too. New 75 amp 12 volt...
    ALTERNATOR 95 AMP ARCO MARINE ALTERNATOR PCM - INDMAR 6 GROOVE PULLEY OEM
    27%
    $229.95 $317.14
    New 95 amp 12 volt marine alternator with 6 groove pulley Fits 2007 Mastercraft X-Star + more! PULLEY INCLUDED! Internal regulator negative ground Alternator 95A...
    ALTERNATOR KIT 100 AMP RETRO FIT 5.7L GM ENGINE RF097009B
    13%
    $343.95 $395.93
    100 Amp Alternator Retrofit Kit 5.7L GM For 5.7L GM Engines Retro fit kit, upgrade your 70 Amp GM alternator to the better 100 Amp Alternator...
    ALTERNATOR KIT 100 AMP RETRO FIT 6.0L GM ENGINE RF097009C-6.0L
    11%
    $350.64 $393.49
    100 Amp Alternator Retrofit Kit 6.0L GM For 6.0L GM Engines Retro fit kit, upgrade your 70 Amp GM alternator to the better 100 Amp Alternator...
    ALTERNATOR KIT 100 AMP RETRO FIT PCM GT40 EFI AND CARBURETED FORD ENGINES OEM
    13%
    $379.95 $438.80
    100 Amp Alternator Kit GT40 EFI & Carbureted Ford Engines Originally designed for the GT40 EFI engine Will work on Carbureted Ford engines Just use your...
    ALTERNATOR MANDO 55 AMP SERPENTINE GROOVED PULLEY INDMAR LT1 - LTR REPLACEMENT ALTERNATOR MANDO 55 AMP SERPENTINE GROOVED PULLEY INDMAR LT1 - LTR REPLACEMENT
    11%
    $239.05 $268.64
    Mando 55 amp marine alternator with 2 in. mounting foot and multi-groove serpentine pulley fits Mercruiser marine engines. New 55 amp 12 volt marine alternator...
    ALTERNATOR UPGRADE KIT 90 AMP V-BELT STYLE PRESTOLITE ORIGINAL INDMAR 495105
    4%
    $379.05 $395.93
    90 Amp Alternator Upgrade Kit - OEM INDMAR For V-Belt Style Prestolite Alternator
    BOLT FOR BOTTOM STARTER MOUNT OEM# PCM-R009167
    11%
    $5.95 $6.65
    Bolt used to mount GM new style P.M. starter - 3/8-16 X 4.33" You will need 2 of these
    IDLER PULLEY LT1 ENGINES REPLACES NLA INDMAR IDLER PULLEY IDLER PULLEY LT1 ENGINES REPLACES NLA INDMAR IDLER PULLEY
    26%
    $63.05 $84.99
    Idler Pulley LT1 - Replaces the NLA Indmar Pulley
    PULLEY ALTERNATOR MANDO 51-55 AMP ALTERNATOR PULLEY V-BELT OEM PULLEY ALTERNATOR MANDO 51-55 AMP ALTERNATOR PULLEY V-BELT OEM
    39%
    $15.43 $25.13
    Alternator 55A V-Belt Pulley Mando Alternator Pulley Fits all 51 and 55 amp v-belt alternators with V-Belt Pulley measures 2-11/16" In Diameter Pulley Measures 1-1/16" Thick...
    VOLTAGE REGULATOR ASM PCM ORIGINAL ITEM 97201
    18%
    $69.95 $85.46
    PCM Voltage Regulator ASM  Crusader Part# 97201 FACTORY ORIGINAL PCM
    VOLTAGE REGULATOR FORD - GM PCM ARCO BRAND VR406 VOLTAGE REGULATOR FORD - GM PCM ARCO BRAND VR406
    10%
    $44.05 $48.95
    Voltage Regulator for most PCM Engines through 1982 ARCO - VR406 Designed to provide a steady, constant voltage level from marine alternators 12 volt DC...
    VOLTAGE REGULATOR FORD - GM PCM ORIGINAL ITEM R098002
    14%
    $94.49 $109.84
    Voltage Regulator for most PCM Engines through 1982 Prestolite 8-406 FACTORY ORIGINAL PCM If you prefer a more economical option, the ARCO is also available...
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