I'm a bit puzzled. I got the motor cheap in 2020 because it was on a pallet, had been on the market for a while. It ran rough when I first hung it on my transom, leading me to eventually diagnosing a blocked injector. I had the set cleaned by a service in West Kelowna and everything ran fine after that. Have put on just 180 hours in the four and a bit seasons since then, very happy with this match for my hull.
Now it's a different injector that's not delivering fuel. Regardless of actual hours, I've done a 300 hour service every other fall, so it's had new fuel filters, including the VST filter in your link. That little conical filter is in the return side of the high pressure circuit, so it only sees the fuel not needed by the injectors for the given rpm and load. I'll definitely have a good look at its condition, if I see any debris there then I have to suspect high pressure fuel circuit hoses are breaking down due to age. I installed all new fuel lines throughout the hull to the lift pump in 2020, but the hoses in the cowling are original. I'll also have some questions for the injector service about what material they find in this set.
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