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0.75HP 3-5/8" SL x 3-3/4" OD Impeller 91693551 0.75HP - Bubbles Supply

0.75HP 3-5/8" SL x 3-3/4" OD Impeller 91693551

Part #: 91693551

$58.81
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this impeller

Replace your worn Aqua-Flo by Gecko main pump impeller with this genuine OEM 0.75HP replacement part. Designed for Aqua-Flo FMHP and FMCP pump series, this red dot impeller delivers the precise water flow your spa needs for optimal performance. The 3-5/8" seal length and 3-3/4" outer diameter ensure proper hydraulic matching with your existing pump wet end.

When you choose this authentic Aqua-Flo by Gecko impeller from Bubbles Supply, you get exact fit guaranteed, same-day shipping on in-stock orders, and our comprehensive 1-year warranty for complete peace of mind. No guesswork, no compatibility issues – just the right part delivered fast.

Before installation, always verify your current impeller's dimensions and HP rating match these specifications. Remove power to your spa and drain the pump before beginning any impeller replacement work.

Exact part number

91693551

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 3/4 HP wet end impeller
  • Aqua-Flo impeller
  • FMCP impeller
  • FMHP impeller
  • red dot impeller

Looking for an older part number? Check our supersession lookup tool

Technical specifications

Horsepower
0.75 HP

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • Weak or reduced water flow from jets
  • Pump runs but jets have little to no pressure
  • Visible impeller damage, cracking, or wear
  • Loud grinding or rattling noise from pump housing
  • Pump cavitating or losing prime repeatedly

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy — quick checklist

  • Confirm your pump is an Aqua-Flo FMHP or FMCP series before ordering
  • Verify the HP rating on your existing pump motor label matches 0.75 HP
  • Measure your existing impeller — seal length must be 3-5/8" and outer diameter 3-3/4" before purchasing
  • Check the color of your existing impeller — this is a red dot impeller and must match your current wet end configuration
  • Inspect the pump seal and diffuser while the wet end is open — replace if worn to avoid a callback

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Medium — Some experience neededTypically 45–90 minutes

Warranty

1 year manufacturer warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee →

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers — no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

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