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Most of the time they arise after a bad seal or hairline crack in the casing allows water intrusion. Bilge Pump Battery Capacity And Less Torque.
1000 hours at wide open throttle say 45mph is about 45000 miles.
Common problems with jet boats. Some of the disadvantages of jet boats and jet skis include. They Are Twice as Loud When You Cross The 30 MPH Threshold. Jet Skis and Jet Boats Can Suck Up Foreign Objects in Shallow Water.
Used Jet Skis Can Come with A Ton of Problems. See Doo Boats Would Get Rusty Rings and Housings. Bilge Pump Battery Capacity And Less Torque.
The boat can be divided into three categories - jet unit engine and hull. If something is wrong with the boat it is usually poor acceleration and load carrying coupled with excessive fuel consumption or engine RPMs. It could be unusual noise coming from the mechanicals or possibly just poor top speed.
Scupper valve This is the cockpit drain that exits at the rear of the boat under the water line. It is a plastic fitting that many have reported crackedleakingbroken. Worst case scenario is this fitting breaks on the inside of the boat creating a 2 hole below the water line.
Outboard jet drives whether in the form of a converted outboard or an off the shelf model are the most popular choice and indeed if you wish to experiment with a jet opting for a conversion to the lower unit of your outboard is going to be the easiest and most cost effective way to do it. Lower unit issues are common in both outboards and stern drives and can be very tough to spot. Most of the time they arise after a bad seal or hairline crack in the casing allows water intrusion.
The only way to know for sure that a lower unit is completely sealed is to run the boat then look at the lower unit oil to make sure it doesnt have a milky appearance. Jul 12 2012. I have a 951 in my 2001 Sportster that I have owned for three years now.
It is the original engine and has about 170hrs on it. So far the only problem I have had was a leaking vacuum line. The engine has 150 psi compression in both cylinders starts up easily whether hot or cold.
The only known issue with the metal additives is that they can foul the plugs after extended periods of consent RPMs. If you are on and off the throttle like most recreational boats then its not an issue. If they put in the synthetic oil.
Thats not any issue anyway. Since it sits so close to the water the boat feels even faster than it is. Of course those low sides also mean itll take some spray in a cross-breeze but.
Jet Drive vs Sterndrive Boating Magazine. Dock a sterndrive boat and its jet-drive counterpart side by side and the difference is obvious. A sterndrive engine based on an automotive block is much heavier and larger.
MerCruisers 43 MPI measures 28 by 30 by 22 inches and tips the scale at 775 pounds without the Alpha sterndrive. Which is why the Scarab line is destined for failure the boats are a bad product using dated technology and the overall designs are awful. The mini jet boat craze got every manufacturer but at least Scarab made a real boat.
It was small not great quality but the overall design is kind of cool. One of the biggest problems forum users reported was with the wood used on the boat. Instead of a high-quality sealant to protect it the company used a simple gray primer on top.
Also some of the boats used steel staples which could rust out if water gets into the boat. We had some water in the oil so I thought we had a bad head gasket. However after pulling the engine its much worse than that.
In this quick video updat. Most users face problems related to boat gas tank vents. But most reported that it is comparatively an inexpensive problem to troubleshoot.
In most cases replacing the vent and removing the kink of the fill line worked. Customers suggest keeping carb cleaner will come in handy in fixing such issues every time. Board jet owner whose 16-foot modified V john boat developed cavitation problems in water that had any amount of light chop.
The rig performed great the majority of the trips out but one day he had to limp the whole way back to the ramp because it was cavitating so much. Our jet intake intake fins standard mount transom mount. Water can turn a trip on a jet boat into a nightmare.
To tr W A Y Fro JEt oA tS ron Jet boats are twice as loud at 30 mph 50 kmh. Jet boats can suck up weeds sand and foreign objects in shallow water damaging the impeller. Sterndrives were developed specifically for boats.
Jet engines are a secondary adaptation of PWC technology. Lots of rental jet skis have 1000 hours on original 4-stroke engines at this point. Were running jet ski engines in our Yamaha boats so that is a reasonable comparison.
I look at it this way. 1000 hours at wide open throttle say 45mph is about 45000 miles. That is way less than youd expect a car engine to last.
If Your Jet Ski Wont Accelerate. Another very common problem is when your jet ski wont accelerate which is when your jet ski wont take off or does so very slowly. But if it does take off you cant reach top speed for some reason.
You can also feel your engine vibrating or it may just shut off during your ride.