new U joint alpha one Gen II

[williemon]

Im installing new u joints in an 06 alpha one gen II serial number OWxxxxxxx From what I see the sierra 18-6406 is a replacement for this GKN external clip perma lube style. I already have a set of precision 344 joints from an auto parts store and can have them installed and be on the water quickly. Using a micrometer, they seem to measure the same except for the trunnion (the shaft that the cap fits onto). The 344 measure .16 and the old merc u joint measures .17 This is for a V6 motor. Is there any issue using these 344 grease-able joints? Does the smaller size of the shaft under the cap cause a problem?

 

[Bt Doctur]

As long as your not mixing and matching the caps. Both appear to be using external rings

bottom is Sierra

 

[williemon]

Thanks for your thoughts. I was pretty much thinking the same thing since the caps measure the same, but the measurement of the shafts that the caps fit onto was my concern. Since the new ones I have are just slightly smaller than the original, .16 grease-able vs .17 non grease-able (but still drilled or hollow, not solid), should I refrain from using them? Would they be more prone to breakage?

 

[Bondo]

Ayuh,.... Welcome Aboard,.... Ya can't put enough horsepower through an outdrive to break a new unworn u-joint,.....

Either of 'em,...

 

[williemon]

Thanks guys!! I will work on it today and be back on the water soon. I will let you all know how the install went.