Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-29-2018, 07:31 AM   #1
Member
 
City: Biloxi
Join Date: Apr 2018
Posts: 16
Repowering our 30 ft Sundowner

Our 34 year old Pathfinder engine died yesterday. We are beginning the process of figuring out what engine to replace it with. The one we have is a 70 hp. We would like to go to a 90 or 100 hp. Any suggestions? Yanmar, Kabota, Cumming....? Any idea of the price? Appreciate any suggestions.
Eris Turner is offline   Reply With Quote
Old 07-29-2018, 07:40 AM   #2
Guru
 
Sailor of Fortune's Avatar
 
City: St Augustine,Fl
Join Date: Sep 2009
Posts: 3,798
I don't think you can get a Cummins in that small of HP. My vote would be Kabota.
__________________
Jack ...Chicken of the sea! Been offshore 3 miles once
Sailor of Fortune is online now   Reply With Quote
Old 07-29-2018, 07:47 AM   #3
Member
 
City: Biloxi
Join Date: Apr 2018
Posts: 16
I have heard good things about Kabota, what do you think of Perkins or Lehman?
Eris Turner is offline   Reply With Quote
Old 07-29-2018, 07:51 AM   #4
Guru
 
City: Satsuma FL
Vessel Name: No Mo Trawla
Vessel Model: Hurricane SS188
Join Date: Jul 2014
Posts: 2,300
Might want to consider Beta Marine. Believe they use the Kabota block and have 85 and 100hp units.
__________________
Buffalo Bluff Light 28
Donsan is offline   Reply With Quote
Old 07-29-2018, 08:36 AM   #5
Member
 
City: Biloxi
Join Date: Apr 2018
Posts: 16
Thanks for the Beta marine suggestion. How does Yanmar compare to Kabota? The reality of what just happened is just now sinking in! We were meant to be cruising in the Gulf of Mexico around the barrier islands this werkend, instead I'm in my living room trying to decide on how to spend thousands of $$$! Aaah, the joy of boat ownership!
Eris Turner is offline   Reply With Quote
Old 07-29-2018, 08:58 AM   #6
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
Eris,
If you cruise above 7 knots frequently you may want to look at the Yanmars. They are lighter and if you keep your boat light too more speed should be in the bag. A light engine w a turbo should provide.
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 07-29-2018, 09:10 AM   #7
Valued Technical Contributor
 
DavidM's Avatar
 
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,786
I think that the 75-100 hp Betas arebased on the Isuzu block, but still a fine engine and Beta is a quality marinizer.

The 100 hp Yanmar is a smaller block and uses an after cooler which means more maintenance.

So my vote is for the Beta. But also look at the John Deeres.

David
DavidM is offline   Reply With Quote
Old 07-29-2018, 09:39 AM   #8
Guru
 
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48 (sold)
Join Date: Apr 2008
Posts: 10,186
Go to the engines section of boat diesel. Research each and every engine in the size range you’re considering. I’m not aware of any other on line source that compares with this data source. There are more choices than you can imagine, with your nearby dealer support playing an obvious role.

Dimensions, weight, drawings, specs etc are all available. Don’t forget gears are part of the equation. Take your time. This gives you the opportunity to clean up the ER and redo the hidden things that will appear once you’ve begun.
sunchaser is offline   Reply With Quote
Old 07-29-2018, 09:49 AM   #9
Senior Member
 
bgillroy's Avatar
 
City: Marathon, FL & On Loop
Vessel Name: Maka Honu
Vessel Model: Ta Yang, 42 Tayana PH Trawler 1976
Join Date: Mar 2014
Posts: 313
John deer
bgillroy is offline   Reply With Quote
Old 07-29-2018, 09:58 AM   #10
Guru
 
healhustler's Avatar
 
City: Longboat Key, FL
Vessel Name: Bucky
Vessel Model: Krogen Manatee 36 North Sea
Join Date: Oct 2009
Posts: 5,196
If you’re doing a new engine, Beta. If used, there are plenty of JH series Yanmars out there. For ultimate simplicity, Kabota 85. I’m also a Deere fan, but they tend to be tall and heavy.
__________________
Larry

"When life gets hard, eat marshmallows”.
healhustler is offline   Reply With Quote
Old 07-29-2018, 10:38 AM   #11
Guru
 
MurrayM's Avatar
 
City: Kitimat, North Coast BC
Vessel Name: Badger
Vessel Model: 30' Sundowner Tug
Join Date: Jul 2012
Posts: 5,946
Many moons ago, Tad Roberts (naval architect who frequents this site) recommended Beta Marine if we ever wanted to repower our 30' Sundowner Tug.

The PO of our boat put in a 100hp Yanmar 4JH2-UTE and I believe it's too big. We usually run it at 2700rpm which is not much past half throttle, and the turbo doesn't really wind up till just below 1/2 throttle. This gives us 7 to eight knots depending on currents, etc, and uses about 1.3 gph. Adding throttle past that point does add speed but the arse end squats badly, the bow starts plowing a huge wake, and I imagine fuel consumption would increase quickly. It is maybe two/three inches from the forward bulkhead in the engine room.

If we ever repower it would probably be the Beta Marine naturally aspirated 75hp or the 85hp turbo...would have to research a bit.

I'm a letter carrier and can recognize the sweet, smooth running sound of a Kubota diesel engine in a backhoe doing work in someones yard from a street away
__________________
"The most interesting path between two points is not a straight line" MurrayM
MurrayM is offline   Reply With Quote
Old 07-29-2018, 11:16 AM   #12
Guru
 
hfoster's Avatar
 
City: Cleveland
Vessel Name: Irishland
Vessel Model: Chris Craft Corinthian 380
Join Date: Mar 2012
Posts: 587
Mate,

I would have a look at Caterpillar's C-7s or C-7.1s.

Best of luck.

Cheers.

H.
hfoster is offline   Reply With Quote
Old 07-29-2018, 01:50 PM   #13
Guru
 
Woodland Hills's Avatar
 
City: Jacksonville
Vessel Name: Alzero
Vessel Model: Hatteras 63' CPMY
Join Date: Apr 2017
Posts: 1,548
Quote:
Originally Posted by hfoster View Post
Mate,

I would have a look at Caterpillar's C-7s or C-7.1s.

Best of luck.

Cheers.

H.
400hp might be a bit much considering it is a full displacement hull with a 30’ lwl and was built with 70hp.... 7 liters is a bit of overkill.
Woodland Hills is offline   Reply With Quote
Old 07-29-2018, 07:12 PM   #14
TF Site Team
 
Pack Mule's Avatar
 
City: Paris,TN
Vessel Name: Slo-Poke
Vessel Model: Jorgensen custom 44
Join Date: Jan 2013
Posts: 3,749
I would look at Beta Marine / Kabota as well . Great little engine and good support from Beta Marine.
__________________
Marty
Pack Mule is offline   Reply With Quote
Old 07-29-2018, 08:02 PM   #15
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
Beta is great ...
But pricy and getting parts may still be problematic.
I have a back hoe engine too and it’s been great for about 12yrs.
Far less money than ... you name it ... but no bright colored paint job.
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 07-29-2018, 08:10 PM   #16
Al
Guru
 
Al's Avatar
 
City: ketchikan, Alaska
Vessel Name: 'SLO'~BELLE
Vessel Model: 1978 Marben-27' Flybridge Trawler(extended to 30 feet) Pilothouse Pocket Cruiser[
Join Date: Apr 2012
Posts: 2,206
Quote:
Originally Posted by Eris Turner View Post
Our 34 year old Pathfinder engine died yesterday. We are beginning the process of figuring out what engine to replace it with. The one we have is a 70 hp. We would like to go to a 90 or 100 hp. Any suggestions? Yanmar, Kabota, Cumming....? Any idea of the price? Appreciate any suggestions.
Hello Eris,

Thought over considering a "Running Take Out" or other reason for being on the market? Asked as when faced with the cost of a new replacement engine in a boat that is valued say, around $25-30 Thousand, our attitude changed and we made a serious charge to locate a replacement engine. We were successful in obtaining a Perkins 4-236 to replace our Perkins 4-154, a 85 hp upgrade from the 58 hp that was. We acquired ours off Craigslist but there are so many other outlets that one has to ask. I'd ask around the waterfront mechanical shops or even dealers who have made engine change outs knowing of a good 'running take out". This while you price and determine a new engine if that is the determination.

I agree, you had better have dealer coverage for what ever new engine you purchase. By the way, who is going to do the change out? DIY? asked again as installers other than dealers, would perhaps have knowledge of existing used engines.

To for stall the naysayers on used engines, we all are not so wealthy as to buy off the shelf, yet we to enjoy boating, this post is offered as a alternative, not the final solution. Thank you.

Al-Ketchikan
Al is offline   Reply With Quote
Old 07-29-2018, 08:12 PM   #17
Master and Commander
 
markpierce's Avatar
 
City: Vallejo CA
Vessel Name: Carquinez Coot
Vessel Model: penultimate Seahorse Marine Coot hull #6
Join Date: Sep 2010
Posts: 12,559
The EPA has caused marine engines to be turboed, often resulting in overpowering boats. I'm nearly the last USA recipient (2010) of a naturally-aspirated diesel at 80 hp. No?
__________________
Kar-KEEN-ez Koot
markpierce is offline   Reply With Quote
Old 07-29-2018, 08:39 PM   #18
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
Mark NO that does not caues overpowering.
Even easier to put in a smaller turbo’d engine.
They need to get the hp right.
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 07-29-2018, 08:47 PM   #19
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
Murray wrote;
“If we ever repower it would probably be the Beta Marine naturally aspirated 75hp or the 85hp turbo...would have to research a bit.”

Turbo w/o the aftercooler would be OK but 65hp would probably make you just as happy. You seem to have a JH series Yanmar and the basic JH is a natural 55hp. That would probably work very well too.

You could find a take out as Al was talk’in about.
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 07-29-2018, 09:01 PM   #20
Member
 
City: Bellingham, WA
Vessel Name: David Ferguson
Vessel Model: Sundowner Tug 36
Join Date: Dec 2012
Posts: 13
Rocky

My 30 Sundowner was repowered from the 54 hp VW to a 80 hp Cat 3034T (Perkins M85T) 2,400 hours ago. It runs easily at 7kt at 2,000 rpms, burning 1.6 gph. It will go up to 2,600 rpms and 8.1 kt but the fuel burn is probably 3X and the bow tries to climb out of the water. You will see posts claiming “cruises at 8-10 kts” in ads but it is a lie. Set your sights on the 80-85 hp range and be happy. Anything bigger is a waste of time, money and space.

Rocky Champagne, “Agnes Jean”, 1982, 30 Sundowner, hull #3
Rocky Champagne is offline   Reply With Quote
Reply

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


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 08:31 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012