engine coupler

[JBC118]

1988 Marlin 4.3 with Alpha one....i'm about 90% sure my coupler is cooked. I took it to a local guy who verified that the drive was shifting and the upper gear set on the drive was ok.
During our discussion he gave me a quote for a new coupler (about $1200). The funny part is he told me that the job required a new input shaft on the drive. He said a new coupler would not mate with the old input shaft so it had to be replaced..

Does the cost of the repair and the replacement of the input shaft sound right?

 

[Scott Danforth]

if you have been checking the alignment, gimbal, u-joints annually, there would be no reason to replace the input shaft

only if your input shaft is damaged, would a new coupler not line up.

pull the motor yourself, swap the coupler yourself, buy the alignment tool and align it yourself.

 

[Bondo]

1988 Marlin 4.3 with Alpha one....i'm about 90% sure my coupler is cooked. I took it to a local guy who verified that the drive was shifting and the upper gear set on the drive was ok.
During our discussion he gave me a quote for a new coupler (about $1200). The funny part is he told me that the job required a new input shaft on the drive. He said a new coupler would not mate with the old input shaft so it had to be replaced..

Does the cost of the repair and the replacement of the input shaft sound right?

Ayuh,...... Sounds like you need a new marine Mechanic as well,......

What are the symptoms,..??

It depends on how the coupler failed to know whether you need a new input shaft, 'n it can't be known for Sure, til the drive is pulled, 'n the input shaft Inspected,.....
If the rubber failed, the shaft is probably fine,.....
If the spline wore out, or got torn out, ya Might need the shaft too,....

When ya say it got Cooked, I'm guessin' ya smelled burnt rubber, which means the rubber failed, 'n the shaft is just fine,....

 

[JBC118]

i haven't pulled the drive to see how the input shaft looks. This job is a bit above my pay grade. I guess i shouldn't say cooked because I didn't smell burnt rubber. I was boating along, shut if off for a few minutes, restarted and shifted into forward.
Kind of a funny whirring sound next and then i had no gears. I didn't leave the engine running long enough to see if the engine was starting to overheat...
I wouldn't have thought a steel input shaft would be too dinged up by an aluminum coupler...

Thanks for the input

 

[Bondo]

i haven't pulled the drive to see how the input shaft looks. This job is a bit above my pay grade. I guess i shouldn't say cooked because I didn't smell burnt rubber. I was boating along, shut if off for a few minutes, restarted and shifted into forward.
Kind of a funny whirring sound next and then i had no gears. I didn't leave the engine running long enough to see if the engine was starting to overheat...
I wouldn't have thought a steel input shaft would be too dinged up by an aluminum coupler...

Thanks for the input

Ayuh,..... The coupler's splines are steel, as the shaft is,......

No grease, maybe alota trollin', can eat the splines off both pieces with time,......
The whirrin' sounds could be just that, stripped splines,.....

Reach down behind the motor, where the shaft/ coupler is, there should be metal filin's all over the place,.....