Mercruiser Water Shutters

Exhaust Water Shutter - Sierra
Your Price: $23.99
Save: $4.29
(15% Off $28.28)
Part # 18-2727 ValueShip™ Eligible
No Reviews | Write Review | Ask Question
Replaces OEM part #
Water Shutter - Sierra
Your Price: $58.99
Save: $12.67
(17% Off $71.66)
Part # 18-2732-9 ValueShip™ Eligible
Replaces OEM part #
Water Shutter for Mercruiser 99370A2, GLM 89160 - Sierra
Your Price: $21.99 (Out of stock)
Save: $5.40
(19% Off $27.39)
Part # 18-2733 ValueShip™ Eligible
Replaces OEM part #
Mallory Water Shutter, Exhaust 9-42800
Your Price: $23.99
Save: $3.31
(12% Off $27.30)
Part # 9-42800 ValueShip™ Eligible
Hurry! Only 1 left in stock
No Reviews | Write Review | Ask Question
Replaces Original Equipment Manufacturer(OEM):Mercruiser
Replaces Original Equipment Manufacturer # (OEM #):60930
Fits Application:4 cyl - V-8 SB
Merc. Divider Plate Gasket
Merc. Divider Plate Gasket
Your Price: $11.26
Part # 521-32
No Reviews | Write Review | Ask Question
  • 27-19050 6
Average Customer Review for Water Shutter - Sierra
Based On 1 Review | Write Review
88 mercruiser 5.7l alpha one water shutters
by Sam from Monticello, Iowa on May 10, 2014
Decent product, more restrictive than older design, less prone to breaking though. Note especially for the older casting y pipes, my new shutters did not just fit right in. My castings were not the same size as plastic ring and the plastic will break easily if forced. I had to hand file the y pipes to fit these replacement water shutters. But mine is a 88. Little hand tuning and mine fit fine, work very well. Might just be mine, but I thought I would throw it out there if I'm not alone with imperfect cast aluminum 4" oval y pipe.
Was this review helpful?
Based On 1 Review | Write Review
Returning Items Through iboats a RIPOFF!!!
by John from Dixon, Missouri on March 21, 2012
I ordered this item for a boat, then sold the boat before they arrived. I had no issues paying the return shipping, because this was my choice. I simply wanted to get my money back for an item that I did not need. However, after following their VERY complicated return procedures, I shipped the item back in plenty of time, but was told by iboats that my return authorization was expired. So basically what happened, they took my item back, put it on the shelf, then told me that they never got it. DO NOT TRUST iBOATS!!! I have since bought a new boat, and will be buying ALL my parts from Jamestown Distributors or West Marine. I will never do business with these ripoff artists again...
(15 of 16 people found this review helpful)
Was this review helpful?
Is this listing for a pair or for a single shutter?
This part number is for a single shutter, not a pair.
Will this part fit inline 6 165hp mercruser?
Yes. This water shutter works for several different Mercruiser applications, including your Inline 6 165 horsepower motor.
Will this fit my 1990 7.4 Mercruiser exhaust, my old ones dont look like these ones.?
Unfortunately, this shutter is not compatible with your Mercruiser motor. Feel free to post a question on our Forum page to find the shutter you need:
Ask a question for
Question & Answer Guidelines
This product ships in 1 to 2 business days.

Add to Cart and enter your Postal Code to determine the shipping charges and estimated delivery date.
* Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies