The shop manual will guide mechanics and owners through each service, troubleshooting and repair procedure possible. The net result of this combination is reduced porpoising and improved acceleration, with no loss of smooth-water peak-speed ability. All our Hammer kits use the most retarded setting of 23 degrees. The Hammer Kit mandates the use of a Hot Seat cdi box , which eliminates the rev limiter. Air leak test kits for your 1050 are available from Watercraft Connection 503 232-2026. Increasing the horsepower of the 2 seater hulls can compound this high speed rough-water handling problem. For customers planning to build a Hammer Kited machine, we strongly recommend a crankshaft rebuild on any crank with over 60 hours on it.
Furthermore, this nose heavy ride causes the rider to take excessive punishment through the handlebars in rough water conditions. In the end, the best solution was to use the Hot Seat heat-treated drive shaft long version , with the stock rear set pump arrangement. This is a Standard remanufactured Polaris 1050 engine. We do not consider the stock pipe or waterbox to be a handicap of any kind on our Limited and Sleeper Kits. We confidently claim that Group K cylinder porting will yield a wider power band and longer piston life than any other porting modification available anywhere.
This, in addition to extensive research, is how Clymer repair manuals achieve an unmatched level of detail. This re-pitching is absolutely mandatory for Hammer kit machines to net the best peak water speeds. The high rpm 2 seaters become impossible to ride at the high speeds in the rough water that might cause these load problems. The Limited and Sleeper Kits are both intended to be used with the stock ignition and limiter the Sleeper gains added speeds by pulling a steeper impeller. On older 1050's, this cushion is notorious for disintegrating, causing a very bad vibration. We then machine the ride plate in a way that lifts the nose of the hull slightly away from the water surface on smooth water. The Xo prop is used on the 3 seater Limited and Hammer formats, while the X1 is used on all the rest.
For owners who do more smooth water riding, the 4-degree nozzle wedge can offer a little extra nose lift, and thereby ride comfort. That means there are actually 6 complete pipe bodies the 3 interior expansion chambers, and the 3 exterior water-jacket chambers. For this modification, simply send the carb bars along with you other parts for modification. The porting mods used in these kits are the result of many months of performance and wear evaluation testing. While this vane body performs well, the relatively thin aluminum vanes tend to be easily damaged by debris passing though the pump rocks in particular. Some owners have reversed this wedge to improve rough water handling and reduce porpoising. However the 3 seaters are another story.
The 1050's come standard with an aluminum cast vane body behind the impeller. . If the porting is performed by someone with very little experience, that may be true. All ported cylinders are also honed. All the sanding strokes should be front to back continuous for the full length of the hull. In the past, cylinder porting has received an undeserved reputation as a modification that causes a loss of reliability and engine life. All of our 1050 kits utilize the stock reed cages and petals.
The single easiest fix for this is the installation of the Ocean Pro ride plate. However installing these often very expensive carbs, on a recreational machine like the 1050 Sleeper, results in very questionable increases in performance and significant increases in fuel consumption. While this finish looks real nice, it is totally non-functional. Once the engine is warm, starting is instant without any priming at all. Like most other Polaris models, the 1050's employ a large diameter spacer to set the pump case and impeller several inches further back on the hull. Unfortunately this same thrust angle serves to compound the porpoising problem.
They are as follows: Limited Kit - This affordable modification is ideal for the recreational owner who wants a noticeable increase in overall performance without major teardown work. This sanding preparation allows the same 2 seater hull to run arrow straight at peak speed, along with much more responsive steering control. This 4-degree wedge is not advisable for high speed rough water riding, as it can yield excessive nose ride height. This kit offers very significant increases in overall acceleration and peak water speed while still retaining the stock exhaust system and ignition. It bears noting that, during our testing, we found that the 1050 engines do not respond well to big increases in compression ratio as some other pwc's do. It offers a good combination of air inlet and water spray protection. While these waterboxes can offer a noticeable improvement in overall performance, they also yield a very significant increase in exhaust sound level.
As noted herein below, all other warranties, express or implied, including warranties of merchantability and fitness for a particular purpose, are expressly disclaimed. This damage is not crucial on a recreational machine, however it can be very crucial to the peak performance of the high output Hammer Kit. These specifications play the key role indicating the amount of overall power that the engine can make, as well as the quality of fuel that you may use. The only modification required to accommodate them is the opening of the passages in the inlet manifold, and the installation of a 3rd pulse line for the center carburetor. We would recommend that the thermostats be replaced each season. Pressure testing involves pressurizing the lower end of the engine to 8 - 10 psi with the inlet and exhaust manifold ports blocked off air tight. The best way to accomplish this finish is with a piece of very coarse emery 40 - 60 grit is best.
To help correct this, the compression ratios of the 3 domes are staggered slightly different to help equalize the combustion chamber temperatures. This service manual is written for the do-it-yourselfer as well as the experienced mechanic. These tapered throat carbs bolt directly onto the stock inlet manifold and match up perfectly to the stock flame arrestor and throttle cable. For all owners building a Hammer kit, crankshaft truing and welding is considered mandatory to avoid crank journal twisting between cylinders. The deep, full length, scratches should eventually eliminate any part of shiny surface. This head modification has a two fold purpose. Based on out testing, the majority of this porpoising is caused by the nozzle wedge between the exit nozzle and the vane case that aims the water thrust slightly upward.
If the rev limiter is eliminated, this same scenario takes place within a higher rpm range. Our cylinder porting is available in two different finish modes. The Hot Seat boxes can be set up with different ignition timing values. The angle and face of our ride plate modification requires considerable accuracy, hence the cost. However as water conditions become rougher, the short 2 seater hull can become somewhat difficult to control. This octane enhancement offers a big safety buffer against detonation, and the piston damage that detonation can potentially cause.