MERCURY/MARINER OUTBOARD 4 CYL INLINE PISTONS from MASTERTECH

Wondering
"Where-'n-'Ell"
to get great parts for your outboard?

Right Here!

WSM Piston
with Moly
Coating

Sign Reads "Wanted: Good Woman Must Be Able To Clean, Cook, Sew, Dig Worms, and Clean Fish. Must Have Boat and Motor. Please Send Picture of Boat and Motor.

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If your Mfgr. says:

That motor's 7 years old!!
Part is no longer available.
We lose $$ on service!
EPA made me do it!
Part's at central warehouse, you'll get it next month.
We don't make parts for those.
We only do warranty work.
Our techs only fix late models.
No clue what's wrong! So we'll work time & material.

Baloney!!

Contact
the Mastertech!

REPLACEMENT PISTONS

4 & 6 CYLINDER INLINE

2 & 3 CYL Pistons are here
V-6 Pistons are here

MASTERTECH presents pistons for rebuilding your motor. These are WSM cast pistons unless noted
MOST WSM PISTONS HAVE A BLACK MOLY COATING TO REDUCE FRICTION & HEAT BUILD-UP DURING BREAK-IN.
WISECO forged perfomance pistons available at extra charge.
ALL pistons come complete with rings, wristpins and retainers/clips.

NOTE!! Please take the time to enter the serial number of your motor.
This info will be stored in the shopping cart and sent in with your order.

NOTES ON MERC L-4 INLINE MODELS:

On Inline 4-cylinder motors two types of connecting rod / piston combinations are used - top and bottom guided. This refers to the method of aligning the rods to the crankpin and cylinder centerline. You can identify which type you have by the forging number on the rod as follows:

TOP GUIDED = 646-81884
BOTTOM GUIDED = 638-85321

PISTONS PRICED INDIVIDUALLY. PLEASE SELECT QUANTITY AND BORE SIZE ON THE TABLES BELOW.
ORIGINAL EQUIPMENT AND OTHER BRANDS ALSO AVAILABLE.
Rings, wrist pins and retainers included

4 Cylinder 40 HP 1990-1997 45 HP 1986-1989 50 HP 1970-1985 (Classic inline 4)	Piston Part # 100-05K series STD BORE SIZE = 2.565" QTY: Size: $85.50 each
4 Cylinder Original high dome pistons NLA use these low-dome instead 75 HP 1984-1986 Crossflow ~~High Dome~~ 80 HP 1978-1983 Crossflow ~~High Dome~~ 85 HP 1973-1977 Crossflow ~~High Dome~~	Piston Part # 100-15K series STD BORE SIZE = 2.875" QTY: Size: $89.00 each
4 Cylinder 80 HP 1987-1989 Loop Charge Bottom Guided Conn Rod 100 HP 1989-1991 Loop Charge Bottom Guided Conn Rod 115 HP 1989-1991 Loop Charge Bottom Guided Conn Rod	Piston Part # 100-25K series STD BORE SIZE = 3.375" QTY: Size: $107.25 each
4 Cylinder 100 HP 1992-1993 Loop Charge Top Guided Conn Rod 115 HP 1992-1993 Loop Charge Top Guided Conn Rod	Piston Part # 100-35K series STD BORE SIZE = 3.375" QTY: Size: $119.25 each
4 Cylinder 100 HP 1994-2001 Loop Charge Big Bore 115 HP 1994-2004 Loop Charge 125 HP 1994-2004 Loop Charge	Piston Part # 100-40K series STD BORE SIZE = 3.500" QTY: Size: $105.00 each
6 Cylinder INLINE 115 HP 1984-1988 Crossflow Low Dome 140 HP 1972 Crossflow Low Dome	Piston Part # 100-15K series STD BORE SIZE = 2.875" QTY: Size: $89.00 each
6 Cylinder INLINE Original high dome pistons NLA use these low-dome instead 90 HP 1978-1987 Crossflow 115 HP 1970-1983 Crossflow 135 HP 1970-1971 Crossflow 140 HP 1972 Crossflow 150 HP 1973-78 Crossflow	Piston Part # 100-15K series STD BORE SIZE = 2.875" QTY: Size: $89.00 each

We pay the freight out in USA on all orders over $100.00. Orders less than this amount will have a shipping and handling charge of $8.75 added. Some bulky and heavy items will incur additional charges. You will be notified beforehand if this is the case. Remember, all orders receive free technical support from the MasterTech!

Please review our Warranty, Returns & Refunds policies before you place an order.

DISCLAIMER

The information provided on these pages is correct to the best of my knowledge, however the MasterTech makes no warranty, express or implied, regarding the use of, results of, or liability created from, application of this data. This information is disseminated in good faith, however MasterTech assumes NO LIABILITY whatsoever in regard to this service. The information, software, products, and services published on this web site may include inaccuracies or typographical errors. Changes are periodically added to the information herein. Mastertech may make improvements to this site at any time. Parts ordered from this website may or may not be in dealer stock at the time of order. Thank you for reading.