The Ins and Outs of Engine and Shaft Alignment Part I
MORE Shaft Work
Marine Propeller and Shafting Alignment
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Engine room EP7 B: Shaft alignment
Alberg 37
COMMENTS
The Ins and Outs of Engine and Shaft Alignment Part I
The Ins and Outs of Engine and Shaft Alignment. A laser can be used to "sight through" a shaft. Here the laser has been positioned in the aft-most shaft bearing, and aimed at the transmission output coupling. When it's centered, the shaft droop will have been eliminated. The pilot bushing is damaged, dents can be seen between the 12:00 ...
yanmar 1gm10 engine and shaft alignment
Engine should be equally supported on all four mounts.Tighten all motor mounts, recheck alignment with feeler gauges and bolt coupling halves together. Lastly, in neutral, rotate shaft by hand. It should spin freely without any binding or rubbing on the stern tube. Job requires patience.
Involving Engine/Shaft Alignment
Here's a short list of the problems associated with incorrect alignment and poor or worn out engine mounts: Rapid bearing wear. Causes stuffing boxes to wear out and leak, not infrequently sinking the boat. Bent or broken shafts. Drive system vibration that can damage transmissions, engine mounts and the boat hull itself.
Marine Engines : Drive System Alignment by David Pascoe, Marine Surveyor
Wear or worn out engine mounts cause drive shaft misalignment to stern drive, causing universal joints and gimbal bearings to oscillate and wear out. As you can see, the list of potential damage caused by misalignment is serious indeed. The good news is that drive systems tolerate a lot of abuse and are very forgiving.
Shaft Alignment
As the shaft bearings are aligned, the engine is also brought into precise alignment with the shaft. "Even experienced yacht people think that if you get the two faces of the propeller shaft coupling exactly parallel, the engine is aligned, but you've got a huge amount of weight, seven or eight feet of shaft and a heavy coupling, hanging out there unsupported once it leaves that last ...
Engine/shaft alignment
Last time I ran my diesel I noticed the stuffing box seemed to run warmer than usual (even with 3 - 4 drops per minute), so today I decided to check the alignment of the engine and prop shaft. It was off ever so slightly and I went ahead and tried to tweak it. Using a feeler gauge around the...
Shaft Alignment
You want it to rest centered over the shaft so the packing nut is not going to rest on the spinning shaft and score it. 6) Once back in the water, with a tuned rig, sail and run the boat for a few hours then re-check the alignment. If it is way off adjust it as close as you can to .004"-.003".
The Ins and Outs of Shaft Alignment Part II
The maximum tolerance for shaft wear is just one thousandth of an inch. The shaft shown here has been condemned as a result of excessive wear, caused by gross misalignment. In last month's column I reviewed the importance of, and techniques for, ensuring proper engine alignment. That is, the alignment between the engine and the propeller shaft.
Play It Straight
Poor alignment can cause a host of problems, from vibration and noise to propeller-shaft damage. Steve D'Antonio. Engine alignment, like so many other onboard mechanical details, falls squarely into the category of Out of Sight, Out of Mind. If the engine and shaft are set properly the first time, alignment rarely needs to be revisited.
Shaft Alignment
That is, the alignment between the engine and the propeller shaft. Nearly all marine engines are designed to be adjustable, to a point, relative to the propeller shaft, using adjustment or jacking nuts on their motor mounts. The adjustment should be thought of as no more than fine tuning, the maximum range of vertical travel being limited to no ...
Prop Shaft Alignment
You must first take the wobble out of it, then align the coupling flange on the transmission to the flange on the forward end of the shaft. Here's one series of tricks that actually works if your boat is out of the water. 1. Loosen the hose clamps and remove the rubber boot from the front end of the shaft log. 2.
Prop shaft alignment
Prop shaft alignment. Nearly all marine engines are designed to be adjustable, to a point, relative to the propeller shaft by using adjustment or jacking nuts on their motor mounts. The adjustment should be thought of as no more than fine-tuning, the maximum range of vertical travel being limited to no more than an inch or two at the most ...
PDF PROPULSION SHAFTING ALIGNMENT
subject guidelines may help the industry to improve its approach towards shaft alignment analyses and procedures. Additionally, ABS has developed state of the art analytical tools primarily for the purpose of engineering analysis and design. The ABS shaft alignment program, combined with alignment optimization software, is
How to check and adjust propeller shaft alignment
The alignment you will be checking is the space between the propeller shaft coupler and the output coupler from either the transmission or the v-drive. 1) Locate and identify the propeller shaft coupler. On inboards, it's easy to see at the end of the transmission and on a wakeboat, has 4 bolts connecting it to the propeller shaft coupler.
Motor Mounts and Shaft Alignment
Shaft alignment: 1) remove all four coupler bolts. 2) using a pair of vice grips and a thin,flat washer as a spacer, squeeze the couplers together. 3) adjust engine position until the 3 remaining hole locations have all the same spacing, using feeler gauges. 4) target +/- .002 as your goal."
How To Align Your Boat Engine
Shop for all your boating needs at www.wholesalemarine.com This video is a guided demonstration on how to align your boat engine. Use caution and consult th...
Shaft Alignment
The boat is in the water so removing the gland isn't the greatest idea to see where "center" is. I'm thinking of just wedging it up a 1/2 or less and then aligning the shaft to it. top/bottom alignment won't be a issue since the shaft is suspended by the engine. side/side is where I can make a alignment difference I think.
Running Gear Alignment
Applying a calculated lift can offset shaft sag while aligning running gear. For example, 4′ (1.2m) of 2″ (51mm) shaft weighs 42 lbs (19 kg), divided by 2 is 21 lbs (9.5 kg), plus the weight of the coupling—which we'll say is 22 lbs (10 kg)—equals 43 lbs (19.5 kg). Lifting 43 lbs at the coupling end of the shaft will negate the effect ...
Inboard Engine Alignment
Important: Engine alignment MUST BE RECHECKED with boat in the water, fuel tanks filled and with a normal load on board. Engine must be aligned so that transmission and propeller shaft coupling centerlines are aligned and coupling faces are parallel within .003" (0.07 mm).
Alignment of propeller shaft to engine
Boat: IP445. Posts: 35. Re: Alignment of propeller shaft to engine. The proper way to align a shaft is not a feeler gauge. Mount a dial indicator to one shaft and set the clock on the other, with no bolts. Rotate one shaft 360. Then put the bolts in and rotate 360 again.
Prop shaft alignment: on the hard or in water?
Definitely better in water where boat/engine operate. Should actually be floating for 24 hours or longer before aligning, so Boat can take it's floating shape based on keel hanging rather than boat sitting on it and impact of rigging load. Number of hours seems a bit high - but not outrageous.
Engine Shaft Alignment
shaft alignment Wayne, if you have a Yanmar, there is a very good step by step description with pics in the manual (not the small booklet--the larger 8.5" X 11" manual). I also read an excellent article in one of the "how to" books; perhaps Nigel Caldor's.
Inboard Engine Alignment
Inboard Engine Alignment. Written by: Peter d'Anjou on May 1, 2013. Aligning the engine with the shaft is key to eliminating vibration. If you have an inboard engine on your boat and have excessive vibration, it may be due to the engine not being properly aligned with the shaft. Worn cutlass bearings and/or leaky shaft seals are additional ...
IMAGES
VIDEO
COMMENTS
The Ins and Outs of Engine and Shaft Alignment. A laser can be used to "sight through" a shaft. Here the laser has been positioned in the aft-most shaft bearing, and aimed at the transmission output coupling. When it's centered, the shaft droop will have been eliminated. The pilot bushing is damaged, dents can be seen between the 12:00 ...
Engine should be equally supported on all four mounts.Tighten all motor mounts, recheck alignment with feeler gauges and bolt coupling halves together. Lastly, in neutral, rotate shaft by hand. It should spin freely without any binding or rubbing on the stern tube. Job requires patience.
Here's a short list of the problems associated with incorrect alignment and poor or worn out engine mounts: Rapid bearing wear. Causes stuffing boxes to wear out and leak, not infrequently sinking the boat. Bent or broken shafts. Drive system vibration that can damage transmissions, engine mounts and the boat hull itself.
Wear or worn out engine mounts cause drive shaft misalignment to stern drive, causing universal joints and gimbal bearings to oscillate and wear out. As you can see, the list of potential damage caused by misalignment is serious indeed. The good news is that drive systems tolerate a lot of abuse and are very forgiving.
As the shaft bearings are aligned, the engine is also brought into precise alignment with the shaft. "Even experienced yacht people think that if you get the two faces of the propeller shaft coupling exactly parallel, the engine is aligned, but you've got a huge amount of weight, seven or eight feet of shaft and a heavy coupling, hanging out there unsupported once it leaves that last ...
Last time I ran my diesel I noticed the stuffing box seemed to run warmer than usual (even with 3 - 4 drops per minute), so today I decided to check the alignment of the engine and prop shaft. It was off ever so slightly and I went ahead and tried to tweak it. Using a feeler gauge around the...
You want it to rest centered over the shaft so the packing nut is not going to rest on the spinning shaft and score it. 6) Once back in the water, with a tuned rig, sail and run the boat for a few hours then re-check the alignment. If it is way off adjust it as close as you can to .004"-.003".
The maximum tolerance for shaft wear is just one thousandth of an inch. The shaft shown here has been condemned as a result of excessive wear, caused by gross misalignment. In last month's column I reviewed the importance of, and techniques for, ensuring proper engine alignment. That is, the alignment between the engine and the propeller shaft.
Poor alignment can cause a host of problems, from vibration and noise to propeller-shaft damage. Steve D'Antonio. Engine alignment, like so many other onboard mechanical details, falls squarely into the category of Out of Sight, Out of Mind. If the engine and shaft are set properly the first time, alignment rarely needs to be revisited.
That is, the alignment between the engine and the propeller shaft. Nearly all marine engines are designed to be adjustable, to a point, relative to the propeller shaft, using adjustment or jacking nuts on their motor mounts. The adjustment should be thought of as no more than fine tuning, the maximum range of vertical travel being limited to no ...
You must first take the wobble out of it, then align the coupling flange on the transmission to the flange on the forward end of the shaft. Here's one series of tricks that actually works if your boat is out of the water. 1. Loosen the hose clamps and remove the rubber boot from the front end of the shaft log. 2.
Prop shaft alignment. Nearly all marine engines are designed to be adjustable, to a point, relative to the propeller shaft by using adjustment or jacking nuts on their motor mounts. The adjustment should be thought of as no more than fine-tuning, the maximum range of vertical travel being limited to no more than an inch or two at the most ...
subject guidelines may help the industry to improve its approach towards shaft alignment analyses and procedures. Additionally, ABS has developed state of the art analytical tools primarily for the purpose of engineering analysis and design. The ABS shaft alignment program, combined with alignment optimization software, is
The alignment you will be checking is the space between the propeller shaft coupler and the output coupler from either the transmission or the v-drive. 1) Locate and identify the propeller shaft coupler. On inboards, it's easy to see at the end of the transmission and on a wakeboat, has 4 bolts connecting it to the propeller shaft coupler.
Shaft alignment: 1) remove all four coupler bolts. 2) using a pair of vice grips and a thin,flat washer as a spacer, squeeze the couplers together. 3) adjust engine position until the 3 remaining hole locations have all the same spacing, using feeler gauges. 4) target +/- .002 as your goal."
Shop for all your boating needs at www.wholesalemarine.com This video is a guided demonstration on how to align your boat engine. Use caution and consult th...
The boat is in the water so removing the gland isn't the greatest idea to see where "center" is. I'm thinking of just wedging it up a 1/2 or less and then aligning the shaft to it. top/bottom alignment won't be a issue since the shaft is suspended by the engine. side/side is where I can make a alignment difference I think.
Applying a calculated lift can offset shaft sag while aligning running gear. For example, 4′ (1.2m) of 2″ (51mm) shaft weighs 42 lbs (19 kg), divided by 2 is 21 lbs (9.5 kg), plus the weight of the coupling—which we'll say is 22 lbs (10 kg)—equals 43 lbs (19.5 kg). Lifting 43 lbs at the coupling end of the shaft will negate the effect ...
Important: Engine alignment MUST BE RECHECKED with boat in the water, fuel tanks filled and with a normal load on board. Engine must be aligned so that transmission and propeller shaft coupling centerlines are aligned and coupling faces are parallel within .003" (0.07 mm).
Boat: IP445. Posts: 35. Re: Alignment of propeller shaft to engine. The proper way to align a shaft is not a feeler gauge. Mount a dial indicator to one shaft and set the clock on the other, with no bolts. Rotate one shaft 360. Then put the bolts in and rotate 360 again.
Definitely better in water where boat/engine operate. Should actually be floating for 24 hours or longer before aligning, so Boat can take it's floating shape based on keel hanging rather than boat sitting on it and impact of rigging load. Number of hours seems a bit high - but not outrageous.
shaft alignment Wayne, if you have a Yanmar, there is a very good step by step description with pics in the manual (not the small booklet--the larger 8.5" X 11" manual). I also read an excellent article in one of the "how to" books; perhaps Nigel Caldor's.
Inboard Engine Alignment. Written by: Peter d'Anjou on May 1, 2013. Aligning the engine with the shaft is key to eliminating vibration. If you have an inboard engine on your boat and have excessive vibration, it may be due to the engine not being properly aligned with the shaft. Worn cutlass bearings and/or leaky shaft seals are additional ...