I have maybe 4 hours on a new cold fusion coupler with the blue dampner. I noticed how hot it was. I'm guessing it to be 160-170 deg. I used the drive shaft alignment tool and carefully adj motor for coupler alignment. Anybody else notice their coupler running hot. I'm concerned about heat soaking into crank seal.
Hot pto coupler (why)
- Thread starter catpower
- Start date
- Location
- New York Crew
Alignment, crank , or mishaft issues
Quinc
Buy a Superjet
- Location
- California
Is it rubbing again something? Also make sure you align the couplers without the rubber dampner.
Freakrider
X247
- Location
- Tampa Bay area
Midshaft gets hot from rubbing against rubber seals, the double lip front seal of a blaster runs even hotter than the single lip seal.
I have 2 Blasters with same coupler but don't recall other being so hot. Yes I set alignment with out dampener. And set shaft alignment with self entering tool. I feel very good about coupler alignment and gap. I did replace bearings and seals on mid shaft this year and I followed the directions closely. I believe there is a write up on this site. I measured for shaft length closely with calipers. I'm not sure how a double lip seal on mid shaft would create this much heat. I greesed the mid shaft housing that supplies lubrication to seals correct. I wonder if a Kawlasaki dampener would be a better fit.
CrazyJoesRacing
Crazy Joe
- Location
- Lake St. Clair
I have kawiasaki dampeners' get hotter
Quinc
Buy a Superjet
- Location
- California
Just need to do more subs so the water can cool her off. 
Freakrider
X247
- Location
- Tampa Bay area
The new seals ride tight on the midshaft and create heat. Midshafts are known for getting hot especially with new seals, years ago I would worry about it too but have learned It's normal.
Water cooled coupler LOL. Ya just when I got engine bay nice and dry. Ok thanks for some experts chiming in. I'll have to check other ski again and compare the two. When I say hot it like putting my hand on expansion chamber. Temp stickers from McMaster show my pipe running 160 deg. Head 140. If the sticker will stay attached to a spinning coupler I might give that a try for fun.