New engines, Wife says Absolutly!!
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New engines, Wife says Absolutly!!
Hello Brain Trust,
1983 38’ Convertable III
Cat 3208T 300hp
Engines coming out, and new bilge painting and update starting.
Wife says…. “Lets look at putting new engines in it”, especially after redo of the interior etc.
Yanamr, FPT, Cummins, Scania, Cat…….?
Port motor just came out, and sitting on trailer in driveway.
It just got real.
Both Cats are running and need to be Needle Gunned and repainted, but they are a 50 yr old design, and Extremely heavy.
So what are the thoughts on which power package to seriously consider?
Going over to Boat Diesel, to see what others have done.
Thanks for any thoughts.
1983 38’ Convertable III
Cat 3208T 300hp
Engines coming out, and new bilge painting and update starting.
Wife says…. “Lets look at putting new engines in it”, especially after redo of the interior etc.
Yanamr, FPT, Cummins, Scania, Cat…….?
Port motor just came out, and sitting on trailer in driveway.
It just got real.
Both Cats are running and need to be Needle Gunned and repainted, but they are a 50 yr old design, and Extremely heavy.
So what are the thoughts on which power package to seriously consider?
Going over to Boat Diesel, to see what others have done.
Thanks for any thoughts.
- PeterPalmieri
- Senior Member
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- Joined: Nov 12th, '10, 11:26
- Location: Babylon, NY
Re: New engines, Wife says Absolutly!!
Do whatever the wife says. QSB 550s?
1969 31 Bertram FBC "East Wind" hull #315939
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- Posts: 742
- Joined: Jul 22nd, '17, 13:59
Re: New engines, Wife says Absolutly!!
I have been very pleased with my QSB's. The have no detectable smoke or smell and relatively quite. They fire right up and were easy to install.
I would suggest upping the Horse power but you'll likely need new shafts and struts.
I would suggest upping the Horse power but you'll likely need new shafts and struts.
Rick Ott
Carolina Reaper
Hull # Don't have a clue
Carolina Reaper
Hull # Don't have a clue
Re: New engines, Wife says Absolutly!!
As the saying goes….
In for a Penny, in for a Pound
1 3/4 shafts on it now.
In for a Penny, in for a Pound
1 3/4 shafts on it now.
Re: New engines, Wife says Absolutly!!
I've seen the QSB's done with relative ease. Was watching a boat in the Mediterranean with John Deer 315's that looked like a solid package.
What do you have that you can get support for locally?
What do you have that you can get support for locally?
1977 B31 (315 Cummins) Build thread --->https://www.thehulltruth.com/boating-ho ... model.html
2010 Key West Bay Reef | 150 Yamaha
1986 Bertram 28 260 Mercruisers [SOLD]
2010 Key West Bay Reef | 150 Yamaha
1986 Bertram 28 260 Mercruisers [SOLD]
Re: New engines, Wife says Absolutly!!
1 3/4” shafts are plenty for any power you could squeeze into a Bertram 31
Doug Pratt
Bertram 31 Amberjack
FBC hull #315-820
Bertram 31 Amberjack
FBC hull #315-820
Re: New engines, Wife says Absolutly!!
Support for CAT’s, Cummins, John Deere, and FPT that are local to me.
Re: New engines, Wife says Absolutly!!
my attention to detail sucks - but yes if you have a 38 - then I would definitely up the HP - Cummins QSB 550's would probably put a smile on your face.
1977 B31 (315 Cummins) Build thread --->https://www.thehulltruth.com/boating-ho ... model.html
2010 Key West Bay Reef | 150 Yamaha
1986 Bertram 28 260 Mercruisers [SOLD]
2010 Key West Bay Reef | 150 Yamaha
1986 Bertram 28 260 Mercruisers [SOLD]
Re: New engines, Wife says Absolutly!!
Carl, you are correct of course. I have 1 3/4 shafts on Amberjack and think I may be over sized but that’s what started this train of thought.
Kevin I look forward to hearing what power plant you decide on and what shaft diameter the power people call out. My repower happened the same way yours did. My wife got tired of watching me fret over our worn out big block Crusaders and said it was time to replace them with diesel power. Our wives are smarter than we are.
Kevin I look forward to hearing what power plant you decide on and what shaft diameter the power people call out. My repower happened the same way yours did. My wife got tired of watching me fret over our worn out big block Crusaders and said it was time to replace them with diesel power. Our wives are smarter than we are.
Doug Pratt
Bertram 31 Amberjack
FBC hull #315-820
Bertram 31 Amberjack
FBC hull #315-820
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- Senior Member
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- Joined: Jun 29th, '06, 21:24
- Location: Hillsdale, New Jersey
- Contact:
Re: New engines, Wife says Absolutly!!
Think about the cost of parts. The nice thing about Cummins you can get a lot of everyday parts at the local Cummins Truck dealer. I usually buy my engine antifreeze, oil and all filters from the one near me. The price of Valvoline Blue from them is actually a little cheaper than every other place near me.
Just makes life a little easier.
Just makes life a little easier.
1975 FBC BERG1467-315
Re: New engines, Wife says Absolutly!!
Thanks Gentlemen.
Will keep you appraised with the choice of motors.
BTW, my wife likes this boat more than I do!!
Will keep you appraised with the choice of motors.
BTW, my wife likes this boat more than I do!!
Re: New engines, Wife says Absolutly!!
That my friend is a good thing!
I'd answer on motors, but aside from what Tony said about parts and Jeremy about service I do not know much about one motor over another. I love the 6BT Cummins, but they only go up to 370 or so hp. On those I have to say if I have to work on them they are designed to be user friendly. No special tools and very accessible. Engineered to be worked on makes routine maintenance easy.
Things like oil filters are mounted out and open with the opening facing up. Sounds stupid, but dads Steyer has the filter horizontal...makes for fun changing the HOT oil. Need to replace waterpump...lots of fun trying to reach in and around, then small screws so the heads round off. Volvo with rubber o-ring seals on the aluminum piping...expensive to replace if the part can be found and with aluminum and salt water its only an amount of time before they pit. Cat...great motors but as you said heavy and they need specialized expensive tooling. Replace a .02 seal in the fuel (injection ?) pump requires removing several huge items to gain access.
If the larger hp Cummins are designed like the 6BT's I'd be looking at those.
Good luck, let us know the way you go and why.
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- Senior Member
- Posts: 7013
- Joined: Jun 29th, '06, 21:24
- Location: Hillsdale, New Jersey
- Contact:
Re: New engines, Wife says Absolutly!!
I have to agree with Carl, I am partial to Cummins.
1975 FBC BERG1467-315
Re: New engines, Wife says Absolutly!!
QSB 550 is a true contender..
My only worry( issue), is that is that is the max HP package out of that block presently.
Is that such a smart idea, ie. longevity and stress on the engines?
My only worry( issue), is that is that is the max HP package out of that block presently.
Is that such a smart idea, ie. longevity and stress on the engines?
Re: New engines, Wife says Absolutly!!
You’re coming from heavy 300hp cats to 550hp Cummins. You can move a bit quicker without taxing motors much at all and they should last a good long while. Or you can run em hard and all bets r off.
Could also step down in hp, run em like you ran the Cats with a longer motor expectancy, less coin involved.
It really all depends on what your going after… longevity or do you have a new need for speed. Speed costs more on all levels. Or a compromise…only you can answer that.
Could also step down in hp, run em like you ran the Cats with a longer motor expectancy, less coin involved.
It really all depends on what your going after… longevity or do you have a new need for speed. Speed costs more on all levels. Or a compromise…only you can answer that.
Re: New engines, Wife says Absolutly!!
I’m past the “Need for Speed”
Yes I don’t mind going fast, but that is not my main want with this Repower.
If I’m going to spend the money, I would like the best package for the next 10 years.
Yes I don’t mind going fast, but that is not my main want with this Repower.
If I’m going to spend the money, I would like the best package for the next 10 years.
Re: New engines, Wife says Absolutly!!
Looks like the QSB6.7 425hp is going to be the choice.
Not yet finalized, but Damn close.
Not yet finalized, but Damn close.
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- Posts: 742
- Joined: Jul 22nd, '17, 13:59
Re: New engines, Wife says Absolutly!!
Kevin,
Download the operators manual on these engines before you make a final decision. If you do a lot of trolling these might not be the right engines for you. There are limitations on prolonged idle speeds with the 6.7s.
5.9s might be a better choice.
Rick Ott
Carolina Reaper
Hull # Don't have a clue
Carolina Reaper
Hull # Don't have a clue
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