Jump to content
pfrederi

HNV Comparison (Harshness, noise and Vibration

Recommended Posts

WheelhorseBob

I’m in a minority apparently but I love my rubber mounted 161. I’m embarking on another build and it too will be a shaker. Engine choice is still up in the air but I have a K341 that is a candidate. It’s heading to the machine shop this week for a little work and I was leaning on leaving the balance gears out. I still am and the fact that it has Rubber mounts makes me thing it will more than compensate for any increase. For what it’s worth, Wheel Horse  wasn’t alone in adding rubber mounts, was reading that Cub Cadets used them for a lot of years as well. 

Share this post


Link to post
Share on other sites
 
WheelhorseBob

I did a test tonight, I mowed with my 87 310-8 and it has quite a bit of High pitched vibration at rpm. Then I took out my 520H and it was way less. Then I took out my 161 shaker and it was equal or less than the 520. Comparison was at full throttle or roughly 3600 rpm. Bottom line, the shaker mount makes a big difference when compared side by side with another single. Not as much with a twin.

  • Excellent 1

Share this post


Link to post
Share on other sites
 
Jeff-C175

I replaced the shock mounts on my 175 last fall with solids and my impression is that there was little to no difference in transmitted vibration according to my 'butt gauge'.

 

One might say that the rubber mounts were 'gone' but actually they were still functional, the engine wasn't sitting on metal, just had gotten a little too soft and there was excess engine movement when engaging PTO.

 

Share this post


Link to post
Share on other sites
 
Gregor
On 5/20/2021 at 1:24 PM, pfrederi said:

i am convinced some of the reasons they are left out is the hassle timing them.

If and when I ever get my K301 back, the timing gears are staying out. Mainly because I just don't think I'm smart enough to put them back in. :unsure:

  • Haha 2

Share this post


Link to post
Share on other sites
 
WheelhorseBob
5 hours ago, Jeff-C175 said:

I replaced the shock mounts on my 175 last fall with solids and my impression is that there was little to no difference in transmitted vibration according to my 'butt gauge'.

 

One might say that the rubber mounts were 'gone' but actually they were still functional, the engine wasn't sitting on metal, just had gotten a little too soft and there was excess engine movement when engaging PTO.

 

Based on my above observation, I’m not surprised that there is little difference in a twin. The difference in my singles is very noticeable.

  • Like 1

Share this post


Link to post
Share on other sites
 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...