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Author Topic:   YAMAHA HPDI - How do they rate?

vdbgroup posted 05-20-2002 12:33 AM ET (US)
I have heard plenty about the FICHT and OPTIMAX performance results, but not much about HPDI's. A Yamaha mechanic I spoke with recently said out of all the new injection motors, the HPDI's have been the most trouble-free. Opinion's please.
Alan Hiccock posted 05-20-2002 10:25 AM ET (US)
Ive read in other forums they use alot of oil but are pretty bulletproof.
vdbgroup posted 05-20-2002 09:05 PM ET (US)
I would not mind my Yamaha mechanic feeling a little economic difficulty, having just gotten the carbs rebuilt along with a new H2O Pump for $650. (Albeit this is the first time in the shop for my 1989 Yamaha 150).
vdbgroup posted 05-21-2002 09:56 PM ET (US)
How about a little feedback, step right up give your opinion right here.. HPDI, good/bad, What do you think?
SSCH posted 05-21-2002 10:16 PM ET (US)
I have a pair of 200 HPDI CR Yamaha's (2000 models) mounted on a 2000 model 25 Guardian with the 30" transom option (this option raises the Hp rating for the boat to 450 Hp). I love the engines. They (together)consume fuel at about 14 gph cruising at 30 Knots. I've not noticed any excessive oil consumption. I had to replace the fuel pumps in the starboard engine at about 150 hours; no good reason that I can explain. Otherwise, I've had no problems worth mentioning. I've got the engines propped so that either engine can plane the lightly loaded boat and run it at above 30 knots at full throttle. With these Merc Mirage props, the top speed with both engines running is about 43 knots (50 mph) on the differential GPS. The engines are mounted low on the transom so that they almost can't cavitate in a turn or rough seas. The props and the low mounting height cut down on the top speed considerably, but this boat is unstoppable in rough water without regard to its loading. I should mention that I have a T Top complete with open array radar and electronics box mounted in this boat, also cutting down on top speed.
Jim has asked for pictures and I will comply as soon as possible.
vdbgroup posted 05-22-2002 11:34 PM ET (US)
Please comply as soon as possible. As your rig sounds worthy of admiration. Thanks for the info.

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Author	Topic: YAMAHA HPDI - How do they rate?
vdbgroup	posted 05-20-2002 12:33 AM ET (US) I have heard plenty about the FICHT and OPTIMAX performance results, but not much about HPDI's. A Yamaha mechanic I spoke with recently said out of all the new injection motors, the HPDI's have been the most trouble-free. Opinion's please.
Alan Hiccock	posted 05-20-2002 10:25 AM ET (US) Ive read in other forums they use alot of oil but are pretty bulletproof.
vdbgroup	posted 05-20-2002 09:05 PM ET (US) I would not mind my Yamaha mechanic feeling a little economic difficulty, having just gotten the carbs rebuilt along with a new H2O Pump for $650. (Albeit this is the first time in the shop for my 1989 Yamaha 150).
vdbgroup	posted 05-21-2002 09:56 PM ET (US) How about a little feedback, step right up give your opinion right here.. HPDI, good/bad, What do you think?
SSCH	posted 05-21-2002 10:16 PM ET (US) I have a pair of 200 HPDI CR Yamaha's (2000 models) mounted on a 2000 model 25 Guardian with the 30" transom option (this option raises the Hp rating for the boat to 450 Hp). I love the engines. They (together)consume fuel at about 14 gph cruising at 30 Knots. I've not noticed any excessive oil consumption. I had to replace the fuel pumps in the starboard engine at about 150 hours; no good reason that I can explain. Otherwise, I've had no problems worth mentioning. I've got the engines propped so that either engine can plane the lightly loaded boat and run it at above 30 knots at full throttle. With these Merc Mirage props, the top speed with both engines running is about 43 knots (50 mph) on the differential GPS. The engines are mounted low on the transom so that they almost can't cavitate in a turn or rough seas. The props and the low mounting height cut down on the top speed considerably, but this boat is unstoppable in rough water without regard to its loading. I should mention that I have a T Top complete with open array radar and electronics box mounted in this boat, also cutting down on top speed. Jim has asked for pictures and I will comply as soon as possible.
vdbgroup	posted 05-22-2002 11:34 PM ET (US) Please comply as soon as possible. As your rig sounds worthy of admiration. Thanks for the info.