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My 2001 VZ150 is cooked after 7 years and approx 150hrs. I noticed a knocking sound and it turns out cyl 2 and 5 are worn so bad they are slapping around in the cylinder. My service manager says these motors like to run at higher rpm and that running too much of the time under 2000 rpm will kill them. Could this be true? He said it was an oiling issue but stopped short of saying it's a design issue. I need to have some understanding of how the motor works and if this type of wear can be prevented before I can make a decision to fix or to trade...
1. Is there an oiling issue with running HPDI motors below the cutoff for cyl 2 and 5 for significant periods of time?
2. If there is an issue, can anything be done to prevent it (eg. can oiling be adjusted, etc)
3. If there's nothing I could do about it, is there another 2-stroke model or make which would better suit my application?
I am on a small lake about a mile and a half long, so there is limited opportunity for extended running. I use the boat for skiing and general runabout activity and yes, it does get a disproportionate amount of slow operation... which I could cut back on somewhat if I need to. My dealer says I should go to a 4-stroke, by I can't picture a 4-stroke on my boat... an 18' Carlson. I love the torque for skiing and the boat literally jumps up on top of the water out of the hole... that would be tough to give up. It really has been the ideal motor up until this point... but I can't afford to be repairing or replacing it this often. Any insight would be greatly appreciated.
Tim
1. Is there an oiling issue with running HPDI motors below the cutoff for cyl 2 and 5 for significant periods of time?
2. If there is an issue, can anything be done to prevent it (eg. can oiling be adjusted, etc)
3. If there's nothing I could do about it, is there another 2-stroke model or make which would better suit my application?
I am on a small lake about a mile and a half long, so there is limited opportunity for extended running. I use the boat for skiing and general runabout activity and yes, it does get a disproportionate amount of slow operation... which I could cut back on somewhat if I need to. My dealer says I should go to a 4-stroke, by I can't picture a 4-stroke on my boat... an 18' Carlson. I love the torque for skiing and the boat literally jumps up on top of the water out of the hole... that would be tough to give up. It really has been the ideal motor up until this point... but I can't afford to be repairing or replacing it this often. Any insight would be greatly appreciated.
Tim
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