ARP Head Stud Kit for Yamaha Waverunner 1.8 FX HO SHO SVHO FZR FZS VXR VXS

Custom set of ARP head studs. These studs are forged and thread rolled after being heat-treated which provides up to 10-times longer fatigue strength. They are precision CNC-machined to exact specifications. Made from 8470 chrome moly steel, with 200,000 PSI tensile strength.

If you want to modify your watercraft in any way for performance, Euro Export Inc. Distributor’s Yamaha Waverunner 1812cc HO SHO SVHO ARP head stud kit is an essential component. You'll need to replace many parts of these engines because they already have a tough time sustaining stock power. The expansion of gases during combustion in a combustion chamber pushes the piston downward, but all other parts that are impacted by the force must remain stationary. The weakest components of the engine would begin to break down if the combustion power was increased, and the stock head bolts are typically one of those weak points.

Because head studs have a high clamping force, they can resist more power by properly sealing the cylinder head, the engine block, and the head gasket together. Additionally, head studs, like these are built of stronger materials so they won't readily break or crack. Moreover, head studs can be used three to four times before they need to be replaced.

These studs have a high torque after complete CNC machining with extreme precision. The thread rolling on the nuts and stud bolts makes them incredibly strong and long-lasting. It is built to be rust-proof, wear-resistant, corrosion-resistant, and have a long service life.

The cylinder head nut can be installed quickly and without drilling or tapping. It is ideal for replacing a worn-out or broken cylinder head stud. With strict maintenance and factory quality control, these studs provide excellent performance and quality.

This Yamaha Waverunner 1812cc HO SHO SVHO ARP head stud kit will make the engine bulletproof or increase its power as you prefer.

• 10 studs
• 10 12-point nuts
• 10 parallel ground washer
• instruction sheet
• fastener assembly lubricant

INSTALLATION METHOD FOR HEAD STUD KIT

1. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase the

                   threads if necessary with ARP Thread Chaser.

2. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit,

                   length and dimension.

3. Screw the studs into the block "HAND TIGHT ONLY".

                  NOTE: LOCTITE MAY BE USED IF A PERMANENT MOUNTING OF THE STUDS IS PREFERRED.

                  THE FASTENERS, HOWEVER, MUST BE TORQUED PRIOR TO THE LOCTITE SETTING UP.

4. Install the cylinder head, and check for binding or misalignment.

5. Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.

                  Then install the washers and the nuts onto the studs and tighten them hand tight. ARP recommends using the

                 ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to

                  motor oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of

                  the fasteners when motor oil or other low quality lubricants are used.

PRELOAD (TORQUE) RECOMMENDATIONS

6. Following the manufacturers recommended torque sequence tighten the nuts in three equal steps to 95 ft lbs

                with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.

       FOOTNOTE: When changing from factory fasteners to high strength fasteners, clamping force and tolerances will

       change, therefore it will be necessary to check the main bearing bores for proper size and out of round condition after

       installation of the studs and align hone the cylinder block if necessary. The main bores should always be align honed

       using the same fasteners and lubricant which will be installed during final engine assembly at the recommended preload.