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Jan 23rd, 2013
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Boat Gas. #12467026
10/16/17 02:00 AM
10/16/17 02:00 AM
Joined: Feb 2007
Posts: 402
Canton, Texas
F
FishN@Night Offline OP
Angler
FishN@Night  Offline OP
Angler
F

Joined: Feb 2007
Posts: 402
Canton, Texas
I am finally buying another boat and hopefully will have it this week. It has a 2005 Yamaha HPDI 225. What should i be running as additives in the fuel everytime i put gas in the boat? Also if you put in ethanol free gas do you need the additives, and im assuming all motors run on 87.

Last edited by FishN@Night; 10/16/17 03:12 AM.

You Betcha
Re: Boat Gas. [Re: FishN@Night] #12467081
10/16/17 02:50 AM
10/16/17 02:50 AM
Joined: Mar 2005
Posts: 1,381
Temple, Texas
F
Freeman Clark Offline
Extreme Angler
Freeman Clark  Offline
Extreme Angler
F

Joined: Mar 2005
Posts: 1,381
Temple, Texas
I run Yamaha Ring Free and Bio Bor EB in every tank.Running a 2001 115 Yamaha that has never been in the shop.I decarb every fall.

Re: Boat Gas. [Re: FishN@Night] #12467113
10/16/17 03:35 AM
10/16/17 03:35 AM
Joined: Mar 2003
Posts: 1,292
Cisco,tx
scruboak Offline
Extreme Angler
scruboak  Offline
Extreme Angler

Joined: Mar 2003
Posts: 1,292
Cisco,tx
I use 89 octane and seafoam every tank.

Re: Boat Gas. [Re: FishN@Night] #12467238
10/16/17 12:39 PM
10/16/17 12:39 PM
Joined: Aug 2016
Posts: 938
Nacogdoches, Tx
T-racer Online content
Pro Angler
T-racer  Online Content
Pro Angler

Joined: Aug 2016
Posts: 938
Nacogdoches, Tx
Run ring free in that HPDI and DO YOUR FILTER MAINTENANCE. Don't want that HPDI blowing up. Check with previous owner about their maintenance too, those motors should require 100 hour maintenance intervals. Lots of people neglect which is a big reason HPDIs blow a lot.


Bullet 20XRD Comp - Merc 300XS
Mallard Marine Nacogdoches, Tx
972-837-9404
Re: Boat Gas. [Re: T-racer] #12467509
10/16/17 04:44 PM
10/16/17 04:44 PM
Joined: Feb 2007
Posts: 402
Canton, Texas
F
FishN@Night Offline OP
Angler
FishN@Night  Offline OP
Angler
F

Joined: Feb 2007
Posts: 402
Canton, Texas
Yes he has done all maintenance, and just replaced the high pressure fuel pump, and filters and such. And he has all paper work to document. Is there anywhere to get a maintenance type schedule for these HPDI motors, I definitely dont want to blow it up?

Ring free is the only thing I need to run? Is that a stabilizer also, and does the HPDI run on 87 octane?


You Betcha
Re: Boat Gas. [Re: FishN@Night] #12467835
10/16/17 09:10 PM
10/16/17 09:10 PM
Joined: Jun 2012
Posts: 527
Kissimmee,FL
E
El Skeeter Offline
Pro Angler
El Skeeter  Offline
Pro Angler
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Joined: Jun 2012
Posts: 527
Kissimmee,FL
Yamaha 5 Star mechanic recommended 89 octane on HPDI as cheap insurance against detonation damage. As well as the usual
Ring Free and marine stabilizer every fill up.

Re: Boat Gas. [Re: FishN@Night] #12468211
10/17/17 01:35 AM
10/17/17 01:35 AM
Joined: May 2009
Posts: 47
Pensacola, Fl
L
LOSTTEXAN Offline
Outdoorsman
LOSTTEXAN  Offline
Outdoorsman
L

Joined: May 2009
Posts: 47
Pensacola, Fl
HPDI's run really well on clean, moisture free fuel, and are more susceptible to moisture absorbed by ethanol than most outboards. It will eventually clog the fine filters and injectors.
Ethanol free fuel is absolutely worth using if it is available.

Order of proirity;
1. Ethanol free gas, any octane is better than any ethanol octane. Yamaha says 87 is ok. Go with whatever octane is the freshest available.
2. Synthetic blend or full synthetic oil such as Penzoil varieties will reduce carbon build up from occurring to begin with versus Yamalube that builds more carbon necessitating decarbonizing worries.
3.Regular modest or perioric higher doses of cleaning additives such as Seafoam.
4. Fuel stabilizer such as Stabil if you don't burn through a full tank of fuel within 2-3 months.

Last edited by LOSTTEXAN; 10/17/17 01:52 AM.

Grew up on Tawakoni and Texoma before hybrids and stripers existed on either.
Re: Boat Gas. [Re: FishN@Night] #12468594
10/17/17 01:46 PM
10/17/17 01:46 PM
Joined: Nov 2002
Posts: 3,770
Yantis, TX
Gamblinman Offline
TFF Team Angler
Gamblinman  Offline
TFF Team Angler

Joined: Nov 2002
Posts: 3,770
Yantis, TX
Fresh gas and a good ashless oil.

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