03 Suzuki DT225 oil warning lamp issue

Lt.Mike

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Hit my first problem today with my ‘03 Suzuki DR225 2 stroke that I bought used and mounted 10 years ago.
Took the boat out yesterday and anything over 1,800 rpm would trigger the oil Injection lamp and alarm.
It was the first outing this year but I ran it in a 100gal Rubbermaid stock tank for about 40minutes prior without issue .
Rev’ed to about 3,800 and it governs itself pulling power and not letting it rev further .
I doubt the engine was damaged because being that was my first run of the year following winter storage the tank had a 50:1 premix, it could’ve run without the oil injection pump.
Upon returning I ran it again in the tank to flush the salt and try to replicate the oil warning lamp issue. The light flickered once but it didn’t happen again . I ran the rpms gently up to 3,500 and no light but I could hear a random clatter at the higher rev.
I’ve heard these sometimes snap the oil pump rod and wonder if thats what happened here.
Anyone here have experience with these engines that can provide some helpful tips the check ?
Note: I bought this boat back in 2013 and in 2104 at the end of summer I flushed the engine and stored it for a few weeks to be pulled out for the fall striper run. When I went to test fire it it was locked up like it threw a rod. Have no idea how or when that happened. With a wrench on the flywheel it turned slightly but I could hear metal on metal inside the crankcase.
I made a post on that when it happened…
Several months later I found and made a deal on an outboard that was the same year, make, model only 100 digits apart on the serial number with 370 hrs on it. Being the same OB it was plug and play. All the cables and wiring hooked right up.
I’ve been running that one trouble free since and I baby it, never run it hard.
I fabricated a stand for the original OB saving it in the corner of my garage in the event that I needed to pull parts off of it.
Now might be that time.
Lost sleep last night running it all thru my head. Another option I may have is to delete the oil pump and run a pre-mix like I’ve seen done with a lot of Yamaha’s and Evinrude’s . Not sure how to go about that with this and how to get around the computer and its warning light, alarm and rpm limiting system. I also looked up parts to see whats available. The oil pump assembly isn’t available but the sensor is. True I have the other engine to rob parts from too but the sensor is only $30 so I’d grab that if I repair it.
 
Gotten zero feedback but have been reading my repair and owners manuals.
Seems there is a flow sensor in the line buried out of sight behind the tank. That flow sensor is midway in the line between the tank and the pump. It has a screen that needs to be cleaned every 200hrs, mine has 500hrs and that screen was never cleaned.
Thinking the screen flows enough to provide oil up to about 1,800rpm but is clogged enough to restrict flow at higher rpms which is where the alarm went off. The flow sensor is the one part that is still available so I have one on order and am now at UPS’s mercy .
When it arrives I plan to remove the tank, dump and clean it and the lines, add new oil and bleed the air from the pump.
Fingers crossed this does the trick.
 
I can't say for Zukes but I can say that using a separate tank with premix on 2 stroke Yamis or Mercs can be asking for trouble. In some cases big time trouble.
First of all, both Yamis and Merc Optis use variable ratio oiling based on engine speed ( Actually throttle position, The OX66 Yamis use a lower oil ratio at idle of 40:1 and a higher one, 100:1 or so at speed. Using premix can result in too much oil and subsequent oil fouled plugs when idling or trolling and not enough oil at high revs
Engines like the Optis pump oil into multiple areas of the engine not just into the gas like old style motors. That can result in no oil in some critical areas.