Mark's Upgrades to a 2021 Precept 34G

[Terry and Marie]

Mark, finally got the doghouse done on Precept 31UL. I added addition loose sound deadening to the cavity behind the radio area. Used leftover hood material to creat a wall on either side as it had openings to the footwell. Haven’t had the opportunity to check improvement yet.

How far did you go with the cab floor installation? Doing that next week. Sincerely appreciate all the detailed installation details you provide on all your upgrade. Thank you

[mkassab]

Originally Posted by Terry and Marie

Mark, finally got the doghouse done on Precept 31UL. I added addition loose sound deadening to the cavity behind the radio area. Used leftover hood material to creat a wall on either side as it had openings to the footwell. Haven’t had the opportunity to check improvement yet.

How far did you go with the cab floor installation? Doing that next week. Sincerely appreciate all the detailed installation details you provide on all your upgrade. Thank you

Terry, if you look closely at my pics, you'll see I ended the heat/sound insulation just behind the seat, and in front of foot well and driver side slide out

Mark

[mkassab]

Well, we just finished our first long trip. Over 2600 miles from NC, to upstate NY, over to Maine, back to central PA and then back to NC.

Findings and experience:
Engine ran great with no issues. For a gas engine, I couldn't expect more.... in fact, it did much better than I expected.
TOAD was about 3600 lbs and my MPG ran between 7.5 and 8.6 mpg
To my surprise, I was at max weight when I stopped at a truck stop scale. Most concerning was we didn't pack that much and I plan to 4 down tow my Ford F150..... so, that means I needed a rig to carry and tow more.
The generator crap in heat was not good.

So between the need for more weight carring/tow capacity and the generator, we will trade in the Precept 34G. We drive to TX Monday to pick up Friday a "like new" used 2021 Tiffin Phaeton 40IH with only 2000 mile on it.

I'll always be available to help anyone if I can, but this is the last update to this thread.

Mark

[JK31]

Well thanks for all the info Mark. I've enjoyed reading about your mods. A couple of quick questions.

1. Did you go to the dealer for the rear end recall, or did you just check, fill, and go?

2 On the TSB re" the baffle on the passenger side restricting cooling. Did your rig have one, and if it did, did you cut it away yourself.

Once again, Thanks
Jim
2021 31UL

[Jopopsy]

Heckuva upgrade Mark !

I thought I was buying a Precept for the longest tine - Jayco delays and my dealer’s sudden propensity for playing games pushed me out of the Jayco family. Crossing my fingers that my next purchase does us right. Having owned a number of Jayco C’s, I’m very much interested to experience a different take on this class of RV.

[Parrott]

Originally Posted by mkassab

Well, we just finished our first long trip. Over 2600 miles from NC, to upstate NY, over to Maine, back to central PA and then back to NC.

Findings and experience:
Engine ran great with no issues. For a gas engine, I couldn't expect more.... in fact, it did much better than I expected.
TOAD was about 3600 lbs and my MPG ran between 7.5 and 8.6 mpg
To my surprise, I was at max weight when I stopped at a truck stop scale. Most concerning was we didn't pack that much and I plan to 4 down tow my Ford F150..... so, that means I needed a rig to carry and tow more.
The generator crap in heat was not good.

So between the need for more weight carring/tow capacity and the generator, we will trade in the Precept 34G. We drive to TX Monday to pick up Friday a "like new" used 2021 Tiffin Phaeton 40IH with only 2000 mile on it.

I'll always be available to help anyone if I can, but this is the last update to this thread.

Mark

When you say “generator crap”, did you experience shut down issues?

[hawkmaster]

Thanks a bunch Mark for all your upgrade help, will miss seeing it in the future.
Wish you the best on the new Tiffin, have fun, safe travels !!
Pete

[mkassab]

Originally Posted by JK31

Well thanks for all the info Mark. I've enjoyed reading about your mods. A couple of quick questions.

1. Did you go to the dealer for the rear end recall, or did you just check, fill, and go?

2 On the TSB re" the baffle on the passenger side restricting cooling. Did your rig have one, and if it did, did you cut it away yourself.

Once again, Thanks
Jim
2021 31UL

Answer to 1 above.... NO. They never got the parts. Like I said, I just returned after a 2600 mile trip... rig now have 3800 it. I did top off the rear end as I posted earlier... so, fill and go. It needed about 1.5 pts

2.don't know what a TSB is?

[mkassab]

Originally Posted by Parrott

When you say “generator crap”, did you experience shut down issues?

Yes... shutting down.... get too hot. Obviously, it wasn't designed right by Cummins/Onan OR Jayco put in in the wrong way and didn't take the heat and lack of ventilation into account.

[JK31]

2.don't know what a TSB is?[/QUOTE]
Sorry, Technical Service Bulletin 20-2370 from Ford regarding trimming the engine cooling baffle on the passenger side affecting some 2020 F53 built on or before Sept 28, 2020.

[mkassab]

Originally Posted by JK31

2.don't know what a TSB is?

Sorry, Technical Service Bulletin 20-2370 from Ford regarding trimming the engine cooling baffle on the passenger side affecting some 2020 F53 built on or before Sept 28, 2020.[/QUOTE]

My baffle didn't look like the older one and didn't need trimmed.... ?

[JK31]

Originally Posted by mkassab

Sorry, Technical Service Bulletin 20-2370 from Ford regarding trimming the engine cooling baffle on the passenger side affecting some 2020 F53 built on or before Sept 28, 2020.

My baffle didn't look like the older one and didn't need trimmed.... ?[/QUOTE]

Yep, mine too was already trimmed out. I guess that's why I haven't had any overheating/code throwing issues.

Good luck with the Tiffin, night looking MH.

[Parrott]

Originally Posted by mkassab

Yes... shutting down.... get too hot. Obviously, it wasn't designed right by Cummins/Onan OR Jayco put in in the wrong way and didn't take the heat and lack of ventilation into account.

Was this after you put the vents in the compartment door?

[mkassab]

Originally Posted by Parrott

Was this after you put the vents in the compartment door?

Yes, overheat and generator shut down was post vent install.

Mark

[Parrott]

Originally Posted by mkassab

Yes, overheat and generator shut down was post vent install.

Mark

Did you get the 36 code? So I guess the vents along with insulating the fuel line didn’t help? Just trying to be proactive as you were.

[Terry and Marie]

Mark, we are having some rough weather in various parts of Texas, not sure where you are headed but please be aware the roads flood quickly here including parts of major highways. Safe travels. Enjoy the DP. All the best, Terry

[hawkmaster]

Mark, if you're still reading, what would you do next for the generator issue ?

[mkassab]

Originally Posted by Parrott

Did you get the 36 code? So I guess the vents along with insulating the fuel line didn’t help? Just trying to be proactive as you were.

No idea on codes.

[mkassab]

Originally Posted by hawkmaster

Mark, if you're still reading, what would you do next for the generator issue ?

No idea..... I do think running it while driving and hot engine combined all contribute to the overheat issue.

It seems the Generator runs fine overnight with a cool engine.

But, obviously, since I'm trading this Friday.... I'm not thinking of it any longer.

At the end of the day, I believe it's a Cummins Onan issue on poor airflow design.

Mark

[mkassab]

Originally Posted by Terry and Marie

Mark, we are having some rough weather in various parts of Texas, not sure where you are headed but please be aware the roads flood quickly here including parts of major highways. Safe travels. Enjoy the DP. All the best, Terry

Hi Terry.... yes, while driving towards TX, now in Monroe LA, the rivers are very high.

We hit some heavy rain.... but it did wash off all the bugs on the windshield!

Thanks for reaching out,
Mark