How To Repair A Cracked Crankcase

Then the cases have to be made spotlessly clean. The most economical option is a teardownrebuild 9100 cost with a repair to the crack 975 to weld if it can be repaired. Turn around time on a teardownrebuild is 6 8 weeks and then you add another 4 weeks if getting a case repaired.

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Cracked Aluminum Crankcase Repair Options

Repair Cracked Cases

Cracked Aluminum Crankcase Repair Options

However you can repair a hole or crack in an aluminum crankcase.

How to repair a cracked crankcase. A heat lamp after about 6 hours is faster do it too soon and the jb weld gets runny. Sometimes you have to heat the crack up with no filler many times to get all the oil out. If you could soak the crankcase in acetone for a while overnight to see if the oil can be washed out of the pores scrub the cracked area with a new clean stainless wire brush you might be in with a chance of getting a weld. Just change oil after repair to get out cleaner residue.

We have members with boats from all the major manufacturers including yamaha seadoo scarab and chaparral. I have jb welded a stator cover side case together before because the only thing that part of the case does it seal the flywheel and stator cover away from moisture. If you can see thru hole then a bit of beer can cleaned and covered in the jb weld on both sides never hurts anything. We are delighted you have found your way to the best jet boaters forum on the internet.

To repair cracked cases correctly the case halves need to be separated which requires the top end of the motor to be removed. Using some special materials and techniques you can fix your crankcase and make it watertight or better yet oil tight so that your engine can run safely. Jb weld is a temporary solution to a serious problem if the leakcrackhole is located in the transmission case or crankcase. Besides it is a good excuse to enjoy a six pack during the repair.

The final step is the most important and that is to find a qualified welder. Please consider signing up so that you can enjoy all the features and offers on the forum. Use a degreaser and a wire brush to remove grease and dirt from the crankcase. Original message nov 21 2012 950 pm i picked up a nice clean 3000 watt generator from cl with a small crack in the bottom of the crankcase that allows the oil to drain out slowly fell off the back of a pickup.

Cracked aluminum crankcase repair options.