what stops cup sucked up in intake?

The cup covers the Entire intake from outside! Water flushed through the valve in side of cup.

Are you able to use this to pull antifreeze into the raw water systems?

Yes. This is for inboard boats only (works with both D and V drive configurations). Set up and run boat for 15 mins to allow motor to get to operating temperature. Then close the valve to the water source, and open the container valve allowing the antifreeze to enter the raw water system (run till all antifreeze is gone). Make sure the antifreeze reservoir is elevated off the ground to get proper flow.

what is the width of the flusher, my pickup is very large and the normal ones wont fit over it?

It’s the same size as a toilet plunger

what is the diameter of the suction cup?

The outer diameter is 6" the inner diameter is 5", so the plunger walls are 1" thick. You can take a look at the bottom to see what I am referring to. Thank you

Inboard Engine Motor Flusher Fake A Lake Ski Boat Mastercraft

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Description

💦 Flush smarter, not harder — keep your engine lake-ready with zero fuss!

TOOL FREE SETUP - Install in minutes without any tools—get flushing done fast and hassle-free
UNIVERSAL COMPATIBILITY - Works seamlessly with gas or diesel inboard engines featuring thru-hull water intakes
PRECISION WATER INTAKE SEAL - Large rubber cup ensures zero water blow-by or spillage during use
ENGINEERED FOR PERFORMANCE BOATS - Ideal for ski and wake boats like Mastercraft, Malibu, and Nautique—protect your investment
EFFORTLESS TELESCOPING ADJUSTMENT - Twist to customize length from 18" to 30" for perfect fit every time

The Marpac Inboard Engine Motor Flusher is a telescoping, adjustable tool designed for quick and effective flushing of gas or diesel inboard engines with thru-hull water intakes. Its large rubber cup prevents water blow-by, and the tool-free installation makes it perfect for winterizing or maintenance on ski and wake boats. Adjustable from 18" to 30", it fits a wide range of boat models and ensures precise alignment for hard-to-reach water intakes.

Specifications

ASIN	B00H93R2IO
Best Sellers Rank	#21,720 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #10 in Boat Engine Motor Flushers
Brand	Marpac
Brand Name	Marpac
Color	Silver
Customer Reviews	4.7 out of 5 stars 394 Reviews
Engine Type	Inboard
Fuel Type	Diesel, Gasoline
Manufacturer	MARPAC
Manufacturer Part Number	FP0500010
Material	Telescopic
Material Type	Telescopic
Mounting Type	Engine Mount
Operation Mode	Manual
Recommended Uses For Product	For Inflatable Boats, For Salt Water
UPC	787766705799

Reviews

A**Y

Works well

Works well with my Hydrodyne ski boat

22.05.2026

B**N

Great little water muff

Worked perfectly no issues. Solid collector

9.02.2026

G**.

Fake a lake is great

Great tool for flushing inboard motors out of the water. very easy to use.

10.09.2025

M**N

Great

Works great

26.02.2025

M**E

Pricing is good

Just as good as the one offered by Malibu for almost 40$ less

23.03.2026

K**S

Good

Gets the job done

24.01.2026

R**N

Works great

Works great and reliable

20.01.2026

J**A

water

great

17.02.2026

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

View all Trustpilot reviews

$60.16

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

View all Trustpilot reviews

Inboard Engine Motor Flusher Fake a Lake Ski Boat Mastercraft Malibu Nautique

Description

Specifications

Reviews

Common Questions