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I have a Yamaha 200 HPDI. It's a 2002. I have 327 hours on it and have done nothing except change the plugs and gear oil at 100 hour intervals. It was fogged in the fall.
My question is:
What else needs to be done? I plan to change the gear oil and plugs, and I will replace the boat mounted Racor filter. I'm sure there is filters, etc., that need to be changed, maintained- whatever- on the motor.
Can somebody tell me? I'd like to get the parts this weekend and get everything ready. Cod fishing is picking up!
Not as familar with the hpdi's as I have just purchased them but your owners manual should outline the steps and frequency for maintenace. Some that come to mind in addition to what you mentioned are grease all fittings, change the inline fuel filters, change or clean your external oil tank filter.
I would run yamaha ring-free through it. There is a maintanance amount and a one-time cleaning amount to use on the instruction. By the way you should be running this in your gas regularly with the HPDIs, I do per my dealer and the owners manual.
i have a 2000- 150 hpdi, i was asking the same thing-i was told... change lower unit oil every year,check and replace anodes every year if needed, change water pump every other year, unless run alot in shallow water-if so change every year, decarb every year,change plugs every year,change water/fuel filter every year, check high pressure fuel pump belt every year-make sure its not loose,replace high pressure pump belt and fuel pump every 1000 hours or 5 years. i run my engine approx 250 hours year. i use ring free and fuel stabilizer on all fuel purchased. so far no problems. some say its overkill? i don't know?
I also see from the manual that I don't need to REPLACE the fuel filter, just clean it with solvent. Why would the dealer tell me I need a 103 dollar fuel filter? I can't be dirtry enough to replace- it's after a racor filter.
fuel filter just needs to be checked and cleaned, def change out water/fuel filter. racor seems to make 1 of the best filters.also check your hydrolic steering for fluid - hope this helps
I use ValvTecht (spelling?) spray decarb. I've also used Yamaha's brand and OMC's brand. You have to remove the flame arrestor at the front of the engine, then spray it in while the engine runs at a fast idle, wait a while, then run her again to blow out the loose carbon. Some people splice into the fuel supply and use a liquid decarb agent, like Ringfree, but at high concentrations. Any decarbing if you use RingFree in your fuel regularly is somewhat controversial on this board. I know my old 200hp carb'd Yammy was very sensitive to carbon and I ran RingFree all the time. Decarbing the old engine sure seemed to make her run better (less shake), especially at low rpms. Early in its life, my HPDI was prone to over-oiling (now cured). I got in the habit of de-carbing and I still do. I've heard reports of fuel-injected engines "running away" when sprayed with decarb like I do, but my mechanic was the first one I saw do it and my engine does not "run away."
The filter on the engine is a gas (not oil) filter. If water gets by your boat fuel filter, this filter potentially will fill up with water...the alarm goes off...rpms are limited to 2000...gotta drain her, etc. That's why it should be drained every 100hrs per the manual. There should be an oil filter somewhere downstream of the oil tank on the boat. I had one of those clog, but it was at 800 hrs.
Hope this helps.
Bill
If you need engine fuel filter elements or other Yamaha parts, try http://www.boats.net/ The engine fuel filter element is about $18.
Well, I check the filter regularly and there is never water in it, and I drain the Racor regularly and that is clean too, so I'm not worried about there being any water in the engine filter- however I will clean it and reinstall it. I have never used any decarbon spray in it at all, I suppose I will.
Yamaha HPDI Spring Maint 
