Check this NOW if you own or purchase a Yamaha 2 stroke PWC/Jet boat! Catastrophic oil line issue!!

I see several 2 stroke Yamahas killed every year due to this simple, cheap fix.
The oil injection lines have a tendency to harden over time and slide off the nipples on the carburetors, which then pours oil into your hull and not into the engine where it causes damage and in some cases can cause thrown rods or worse.

It is a time consuming task to get to these hoses, as part of the exhaust needs to be removed, but it isn't too complicated to do, and might just save your engine.

Other brands used Oetiker clamps rather that zip ties to hold those oil lines on and rarely have I seen failure from the lines coming off using those clamps.

Here are some affiliate links to the way I repair all of these failures: (the affiliate links give me a small commission on your purchase at no additional cost to you)

New 1/8 ID 1/4 OD Tygon tubing: https://amzn.to/2PLxtOq (Some say 3/16 ID is the proper size, I prefer a very tight fit so as to keep them incredibly snug and not pop back off once installed, So I use 1/8 ID even though it may add extra frustration trying to squeeze a smaller line over the barbed fittings)
25 pack Oetiker clamps: https://amzn.to/2YIin0u
Oetiker clamp pincer (get the 2000387, The newer "14100498" ones look kinda cheesy and have awful reviews compared to the older one like I have which is linked): https://amzn.to/35lMEo7