• Welcome to this website/forum for people interested in the Morgan 38 Sailboat. Many of our members are 'owners' of Morgan 38s, but you don't need to be an owner to Register/Join.

Re-power with a Beta 50

Coy McDonald

New Member
Our old Perkins finally gave out. We decided to replace her with a Beta 50 in combination with 17" four bladed maxi prop. So far we have only had her out for a sea trial but it is a huge improvement over the old Perkins and the 16" featherstream prop. We are bringing her home next week and I hope to have some no wind, no current rpm/speed numbers.
 

Attachments

  • IMG_6990.jpg
    IMG_6990.jpg
    82.5 KB · Views: 48
  • IMG_6939.jpg
    IMG_6939.jpg
    73.3 KB · Views: 44

terry_thatcher

Terence Thatcher
Thanks for letting us know. Beautiful prop. What finally gave out on the Perkins? Mine keeps purring (or roaring) but I have some concerns it will break unexpectedly. Any problems with fit and installation? Or noise issues, such as Keefer Douglas on this site? What rpm do you run for cruising speed? What is your reductioin gear ratio? Watch out for the exhaust riser. I know two folks (including Keefer) who had their new risers burst on Beta 43s.
 
Last edited:

Coy McDonald

New Member
Thanks for letting us know. Beautiful prop. What finally gave out on the Perkins? Mine keeps purring (or roaring) but I have some concerns it will break unexpectedly. Any problems with fit and installation? Or noise issues, such as Keefer Douglas on this site? What rpm do you run for cruising speed? What is your reductioin gear ratio? Watch out for the exhaust riser. I know two folks (including Keefer) who had their new risers burst on Beta 43s.
Last year as we started our Bahamas cruise the ignition pump failed. It was repaired and we headed south but as we motored against the wind and waves there were times that we were making less than 2 knots. If we turned more than 2100 rpm we started overheating. We also had the oil leaks that are common to the Perkins. I decided to change the engine and we brought it from Jacksonville to Titusville for the re-power. As the tired old engine pulled in to the boatyard the drip pan was filled with a couple quarts of oil. We never did an autopsy but I believe it was blow by on a cylinder. As to the instillation, Sean McGrath at Coral Reef Diesel worked closely with a prop shop (sorry can't remember who) to get the best combo with the small space from the skeg hung rudder. He had the mounts fabricated. Other than waiting longer than I wanted to for parts (everything is covid's fault) no problems with fit and installation. Noise? Purrs like a kitten. With the Perkins we had to put sponges between the grill and the eyes on the galley stove. Not ideal when a bleary eyed Captain wants his coffee. (ask me how I know). It has less than 2 hours on it so there are many unanswered questions at this time. We will play with the cruising rpms on our way back home but on the sea trial at 2100ish power into a 20 knt wind we were over 6 kts. We turned downwind and pulled the power back to 1500ish and were still over 6 kts. I will ask Sean about the risers and I would like to talk to Keefer to get his inputs. I know that Beta suggests the 43 for our boat but for a few dollars more why not the 50? (my thinking) It didn't matter because the 43 was on a huge backorder. I will keep the group informed as we proceed. I will get the gear ratio when I get back to her next week.
 
Hi Coy,

Did you have to move the engine mounts or make any other changes for installation, coupling, shaft length? Looks and sounds like a great upgrade! Was the Featherstream too small for the new engine?
 

Coy McDonald

New Member
Hi Coy,

Did you have to move the engine mounts or make any other changes for installation, coupling, shaft length? Looks and sounds like a great upgrade! Was the Featherstream too small for the new engine?
Sean had to have the mounts custom made and he replaced the shaft and they had to cut it down 2 inches. And yes the featherstream seemed like it was too small. At 1800 rpm we were doing over 6 kts. If we went over 2100 reached hull speed and she started to squat.
 

Coy McDonald

New Member
Very interesting Coy. Happy to trade info. I'll be interested especially in your experience with the new prop.
We just brought her home to Jacksonville from Titusville. At 1800 rpm she was quiet and cruised above 6 kts. At 2100 I want to say we were at or above hull speed which I think is about 7.2. We were having some issues with the stuffing box at high rpm (It needs an adjustment) so we didn't spend much time there. I am working on a rpm-kts chart and will post it after we get the 25 hour service and adjustment done. Bottomline is that she is able to power thru wind and wave like a champ. I am very pleased so far.
 

Coy McDonald

New Member
Thanks, good to know. I'm curious on thoughts of 4 blade vs 3 blade prop.
We went from a 3 bladed 16" featherstream (UK made and needed a yearly haulout to service) to a 17" 4 bladed maxi-ease (A diver can adjust the pitch by changing a screw) and I am very pleased. Before the re-power we were struggling against wind and wave and making only 2 kts at times as we tried not to overheat. Now she is a beast. Well still a snailboat but a beastie snailboat.
 

Coy McDonald

New Member
I think John English was unhappy with the four blade. Check the archives. But he does not have the big Beta, I believe.
I seem to recall that John was complaining about cavitation on the 4 blade but I couldn't find the original thread. Sean (the guy who did the re-power) said that at higher rpm it may get noisy but that that was what he called (prop slap) and not cavitation. We did experience that as we cruised home. I wasn't below with my mask to see if it was producing bubbles or not but when I get to clear waters I am going to make sure.
 
Sean had to have the mounts custom made and he replaced the shaft and they had to cut it down 2 inches. And yes the featherstream seemed like it was too small. At 1800 rpm we were doing over 6 kts. If we went over 2100 reached hull speed and she started to squat.
Thanks Coy. Will welcome your further experience with your new engine!
 

terry_thatcher

Terence Thatcher
Question about MaxProps: Need the boat be hauled to lubricate them? I assume so, but . . . It matters to me because given how my boat moves from fresh to salt water each year, I do not haul each year. We just scrub the fresh-water scum off in the spring. Thanks.
 

Warren Holybee

Active Member
Good question. I only haul out every 3 years or so. For those of us in areas where we can sail year round and annual haul outs are not normal, having to haul out just for prop maintenance would really be an expensive drag.
 

mpearson

Mark Pearson
Staff member
It’s no problem to lubricate our Max-Prop while it was in the water. We’ve had a diver do ours twice and it was pretty quick. They did it as a freebie while doing a bottom cleaning. I showed them a YouTube video beforehand and had the grease gun and parts ready. I would have done it myself but the water was quite cold and I sold my dry suit years ago.

BTW - I was never going to spend that much for a feathering/folding propeller but a racing friend talked me into it. In our club races we went from last place to winning our class. HUGE difference. We are not big racers but it also translates into significantly faster passages while voyaging.

Our Max-Prop is a 3 blade, 16” Easy model. We got it when we installed our new Yanmar 4JH45 45HP engine. We couldn’t be happier with the combo. Very fast and the engine purrs like a kitten, no vibrations or oil leaks like the deeply troubled & abused Perkins we replaced it with.
 
Last edited:

yurek

Jerzy Borzym
Question for Max Prop users:
As some of us write on another thread, Morgan has problem to go in reverse.
I try many tricks that are recommended, and boat barely moves.
I re-power my boat with Beta 38, now thinking to change original prop to Max Prop.
I will probably get more speed but I hope for better maneuverability in reverse.
Does change of the prop made real improvement ( it will cost no change -4 bu )?
 

terry_thatcher

Terence Thatcher
My boat backs fine (3 blade fixed) and mostly goes where it feels like and always into the wind if it is blowing. That is the curse of most sailboats without spade rudders. But I have learned to use prop walk to my advantage and rather like it for maneuvering. Mark Pearson says that a max prop eliminates some of the prop walk and definitely makes reverse much more powerful. So, it may enhance maneuverability as well. Best thing, you sail faster.
 

Warren Holybee

Active Member
There are a lot of things that affect propwalk. Pitch, diameter, shape of blade, fore aft position on the aperture, and the downward angle of the shaft.

Consequently, not all Morgans will behave the same. Mine is mostly unmanageable. From a dead stop, it takes a prolonged amount of time before she begins backing, and will turn 90 port before she does. Most of the tricks to deal with propwalk simply do not work on my boat, but there are a few instances I can use it to help.

That said, every one I've met with a feathering prop (any brand) has praised it for how much better it is in reverse.
 
Top