Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 12-11-2012, 05:01 PM   #1
Junior Member
Join Date: Dec 2012
Location: El Cajon. Ca.
Posts: 12
Buying My First Diesel Pusher

Just wondering what everybody thinks of a 2002 300hp Cummings ISB engine. Haven't bought it yet, looking for input.

Coach is a 34' 3 slides, I don't have the gross weight of the coach.

Solar 33 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 12-11-2012, 08:25 PM   #2
Senior Member
Join Date: May 2012
Posts: 2,792
Well, I'll tell you what I've learned the past 6 months. There's been a lot of conversation about the Cummins 300 hp ISB. There are those who'll tell you it's too small, and you'll have problems in the mountains. We bought ours last March and didn't really know much at the time. After reading many threads about this, we got a little hung up on it for awhile. We then realized that FOR WHAT WE SPENT, the ISB is fine for us. It has handled perfectly fine for what we've needed. We aren't going to be going over the Rockies anytime soon, and when we do, it won't be often. It appears to me like it's a trade-off between what is important to you, what you need, and how much money you're willing to spend.
Gene, Gayle, & Oliver
2006 Holiday Rambler Endeavor 40 PDQ/2012 Honda CRV
G.G. is offline   Reply With Quote
Old 12-11-2012, 08:29 PM   #3
Retired Senior Member
RonNBama's Avatar
Monaco Owners Club
Join Date: Oct 2006
Posts: 1,090
Blog Entries: 22
Mike, we went from a 28' Barth with 454 Chevy to a 38' pusher with 330 Cummins. The initial acceleration, that is starting from a dead stop, was noticeably slower with the diesel but as soon as the turbo spools up there was no comparison. You will love the torque. Costs more per gallon for fuel but you will probably get better MPG. Oil and filter changes are a LOT more expensive though. I prefer the diesel pusher myself. I think the 300 will handle the 34' with ease.
(1984 Barth Regal)
(1998 Monaco Dynasty)
2001 Monaco Executive
RonNBama is offline   Reply With Quote
Old 12-11-2012, 09:39 PM   #4
Senior Member
Freightliner Owners Club
Join Date: Mar 2002
Location: Western WA
Posts: 1,292
I was concerned about the performance of the ISB-02 300HP, 600ft pound torque in our coach after we bought it. It has proven to be quite adequate for our needs towing a 4,000 pound car. There were three grades I was concerned about when traveling and towing in 90+ weather in the summer; Cabbage Hill just east of Pendleton, OR, The long grade eastbound on I-84 into Evanston, WY and the grade just east of Laramie, WY on I-84. This powerplant will not fly up those hills at the speed limit but @45mph and passing some of the slower traffic is sufficient for me on Cabbage Hill. Speeds are faster on the other two. Westbound on I-90 at Lookout Pass, MT into ID had me down to 35mph, that is the toughest one we've encountered so far. I like to keep my hill climbing RPMs around 2,500 to 2,700 using whatever gear is needed - this is usually 3rd gear on the MH2500. I hope this experience helps you in your decision making.
Sold the Motorhome, joined the fully retired gang. '07 Winnebago Journey 34H, ISB-02, MH2500
Toad - '08 Ford Taurus X, Blue Ox, Aventa
FleetMan is offline   Reply With Quote
Old 12-11-2012, 10:49 PM   #5
Junior Member
Join Date: Sep 2012
Posts: 1
We just finished driving 1300 miles with our 34 foot Meridian with the 300 Cummins. It was our first long drive and the cummins had plenty of power even through the mountains in Tennessee. We didn't have a toad but I'm sure if you keep the toad on the lighter side you will be happy with the performance. Do not be scared off by he small diesel, in anything below 36 feet it will do fine.
Booner is offline   Reply With Quote
Old 12-11-2012, 11:11 PM   #6
Senior Member
Mr_D's Avatar
Country Coach Owners Club
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,672
Originally Posted by Booner View Post
Do not be scared off by he small diesel, in anything below 36 feet it will do fine.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
Mr_D is offline   Reply With Quote
Old 12-12-2012, 07:16 AM   #7
Junior Member
Jdsengl's Avatar
Join Date: Dec 2010
Posts: 12
I have a 34 foot Monaco Knight with the 300 cummins.
Fantastic fuel economy and good enough performance.
We cross the continental divide 3 times from Alberta down I-15 to Las Vegas every year.
She handles the Rocky Mountains just fine.
I pull a Jeep Wrangler and make the mountain passes at 45 MPH
Without the Jeep on back I make the passes at 50 MPH
Flat freeways, I lock the cruise on 62 MPH and watch my fuel gauge move ever so slow.
Jdsengl is offline   Reply With Quote
Old 12-12-2012, 06:24 PM   #8
Junior Member
Join Date: Dec 2012
Location: El Cajon. Ca.
Posts: 12
I would just like to say thank you to everyone that replied.

Thank you again,
Solar 33 is offline   Reply With Quote
Old 12-12-2012, 06:27 PM   #9
Senior Member
Pusherman's Avatar
Join Date: Oct 2006
Location: Rochester NY
Posts: 2,706
Not a ton of HP/torque, but you will get where you're going. Maybe slow down going up hills, but it will return upwards of 10mpg. on average. Not bad tradeoff, especially for your size coach. It should perform pretty well for you.
'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX
Pusherman is offline   Reply With Quote
Old 12-13-2012, 09:34 AM   #10
Senior Member
Luckiest Dreamer's Avatar
Winnebago Owners Club
Join Date: Jun 2010
Location: Iowa
Posts: 1,189
My experience is that Cummins makes a good product. One that will hold together for more miles than you will need. Not making a size comparison for the needs of that coach.
Larry B, Luckiest Dreamer
Luckiest Dreamer is offline   Reply With Quote
Old 12-13-2012, 10:30 AM   #11
Senior Member
JCM's Avatar
Workhorse Chassis Owner
Triple E Owners Club
Join Date: Nov 2004
Location: Williams Lake,BC Canada
Posts: 1,220
The best formula is 10 hp per foot - length.
2020 Triple E Wonder RTB
JCM is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 06:59 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.