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starter boost relay kits--what are they?

Discussion in 'Mechanic and Repair' started by rbig, Jun 23, 2006.

  1. rbig

    rbig LawnSite Member
    Posts: 112

    Lately I've run across what are termed "starter booster relay kits", or words to that effect. These seem to be a relay, inserted in series with the starter solenoid.

    Are they to boost a weak solenoid? Don't see how they could boost a dragging starter. If they are to boost a weak solenoid, how does this happen?
  2. Jim@MilkyWay

    Jim@MilkyWay LawnSite Senior Member
    Posts: 472

  3. Jim@MilkyWay

    Jim@MilkyWay LawnSite Senior Member
    Posts: 472

    I previewed the above reply before posting it and the URL was like 3 full lines long, so if the link does not work let me know.
  4. tomo

    tomo LawnSite Senior Member
    Posts: 660

    hello , starter relay is usally installed to supply full batt voltage to solenoid windings.The reason for doing so is, original wiring is suffering from voltage drop therefore not suppling full voltage to solenoid windings and effecting pull in operation of solenoid plunger.The relay is wired "pwr side" fused supply from batt ,output to original solenoid spade."siginal-coil side"input wire,from original loom ,output wire to earth.Ther are exeptions to this rule , check with auto elec . tomo

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