Mercruiser Exhaust Manifold Block Off Plates

Block Off Plate - Sierra
Your Price: $37.99
Part # 18-1990 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 20 hrs 21 mins.
Hurry! Only 1 left in stock
No Reviews | Write Review | Ask Question
Replaces OEM part #
  • MERCURY MARINE 73813A1
Exhaust Manifold Block-Off Plate - Sierra
Your Price: $9.99
Save: $1.25
(11% Off $11.24)
Part # 18-4008 ValueShip™ Eligible
Replaces OEM part #
  • MERCURY MARINE 60207
Use with:
    Riser: 18-1971, 18-1978
    Manifolds: 18-1950-1, 18-1951-1, 18-1958, 18-1962
Requires (2) 18-2833 elbow gaskets
Plate, Block Off - Mallory
Plate, Block Off - Mallory
Your Price: $9.99
Save: $1.25
(11% Off $11.24)
Part # 9-40540 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 20 hrs 21 mins.
Hurry! Only 1 left in stock
No Reviews | Write Review | Ask Question
Stainless Plate, w/weep hole
Removes air trapped in the manifold
Fits 9-40556 and 9-40558 risers
Not for fresh water/closed cooling systems
Sierra
Average Customer Review for Exhaust Manifold Block-Off Plate - Sierra
Based On 1 Review | Write Review
"New" old parts
by James from Hamptonville, North Carolina on September 24, 2011
Very nicely cut, fits bolt pattern. However, seems a smidge thinner than OE.
Was this review helpful?
Ask a question for
Question & Answer Guidelines
This product ships in 1 to 3 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