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Yamaha 200 HPDI Cruise RPM

Old 11-03-2019, 07:59 PM
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Default Yamaha 200 HPDI Cruise RPM

I am interested in hearing what RPM you cruise at with this motor. I have a new to me 25/28 Contender with twin 200 HPDI's. I would like to cruise in the upper 30's to around 40 mph but I do not want to stress the motors too much. To run those speeds I would have to run 4000-4300rpm. With a light load and the motors trimmed up I can turn 5200-5300 RPM so I seem to be propped correctly.

Is 4000-4300 too high a cruise RPM for long runs?

I appreciate any input. Thanks.
Old 11-03-2019, 08:10 PM
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Absolutely not
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Old 11-03-2019, 08:20 PM
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I cruise at around 42-4300 rpm giving 30 mph, no problem at all.
Edit to add , sometimes for a two hour run.
Old 11-03-2019, 08:29 PM
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I have a GW 265 Express, and I usually run my HPDIs at 3800 RPM (30 MPH), yielding about 1.8 MPG, which is about optimal....
Old 11-03-2019, 10:13 PM
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That is pretty typical cruise RPM.
Old 11-04-2019, 05:40 AM
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I appreciate all the replies. Sounds like 4000-4300 is not a problem. I will enjoy the faster cruise speeds. I just wanted to double check as the motors have 1000 hours on them and I don't want to put too much stress on them.
Old 11-04-2019, 06:00 AM
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i run 4200 rpm and have 2300 hours on it still going strong
Old 11-04-2019, 07:26 AM
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4100 was the sweet spot on my HPDI 150s. The HPDIs like to be run. At the end of the trip, I would always do a couple minute of WOT to blow out any carbon before heading to the dock
Old 11-04-2019, 08:25 AM
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When I had 200hpdis on my 25open the boat would run as follows. 3000RPMs 30MPH, 4000RPMs 40MPH, 5300RPMs 50MPH
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Old 11-04-2019, 08:32 AM
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Mine gets the best GPH at 4500 RPM and 32 MPH - 15P Mirage Prop
Old 11-04-2019, 01:18 PM
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My 150s cruise around 4000 @ 32 MPH and 11-13 gph (2-engines). Seems to be the sweet spot for these engines.
Old 11-04-2019, 01:26 PM
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Originally Posted by offshore3144 View Post
When I had 200hpdis on my 25open the boat would run as follows. 3000RPMs 30MPH, 4000RPMs 40MPH, 5300RPMs 50MPH
Exactly right!
Old 11-04-2019, 02:00 PM
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When I had your set up I ran at 4000RPM. Was right at 40MPH.
Old 11-04-2019, 02:05 PM
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I have twin 200 HPDI's on my 28 Whitewater and love to run around 35-3700 RPM's which is around 27-28 knots or around 30MPH. I burn around 16.5-17 gallons per hour at that speed.
Old 11-04-2019, 03:10 PM
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Thanks everyone. I agree they seem to like 4100 RPM's.

3000RPMs 30MPH, 4000RPMs 40MPH, 5300RPMs 50MPH
I wish i could get these numbers. I have bottom paint, the extra saddle tanks, and a head in the console. I am probably around 3mph slower and generally get 1.7-1.8 mpg.
Old 11-04-2019, 03:13 PM
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Originally Posted by GSB_Contender View Post
I am interested in hearing what RPM you cruise at with this motor. I have a new to me 25/28 Contender with twin 200 HPDI's. I would like to cruise in the upper 30's to around 40 mph but I do not want to stress the motors too much. To run those speeds I would have to run 4000-4300rpm. With a light load and the motors trimmed up I can turn 5200-5300 RPM so I seem to be propped correctly.

Is 4000-4300 too high a cruise RPM for long runs?

I appreciate any input. Thanks.
I had the same boat, many years ago. The engines topped out at 5800 RPM. Yours should as well. What size/pitch props are you running? Your speed and RPM should nearly be indentical. Sounds like you are under propped. That will shorten engine life unless fixed.
Old 11-04-2019, 04:17 PM
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I believe they are 19 pitch Yamaha props. Will confirm when I pull the boat for the season.

The manual shows full throttle rpm range from 4500-5500 with max hp at 5000rpm. I can turn 5300, maybe more very light, which is near the top of the range so I would not think I am under propped?

I just think I am slightly slower due to bottom paint (will see how smooth the bottom is when i pull for the season) plus I generally run with the main tank at least 3/4 full.
Old 11-04-2019, 04:56 PM
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I can turn mine to 5800 also.....don't be afraid to run em!!!!
Old 11-04-2019, 05:01 PM
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Originally Posted by GSB_Contender View Post
I believe they are 19 pitch Yamaha props. Will confirm when I pull the boat for the season.

The manual shows full throttle rpm range from 4500-5500 with max hp at 5000rpm. I can turn 5300, maybe more very light, which is near the top of the range so I would not think I am under propped?

I just think I am slightly slower due to bottom paint (will see how smooth the bottom is when i pull for the season) plus I generally run with the main tank at least 3/4 full.
You are propped OK. 19s will run about 3300 RPM for 30 MPH. 21s will run about 3000 RPM for 30 MPH.
Old 11-04-2019, 05:17 PM
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Thanks for all of the replies. I am definitely learning a lot.

For me to turn over 5500 would I have to drop to 17's then? Wouldn't that put me farther from the RPM to MPH? (4000=40mph) When researching the boat it seems everyone ran either 19 or 21's.

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