The Jack's Small Engines Forum - Join Our Online Community
Reply to post

Kawasaki fr691v carb question

Author
glennander
Starting Member
  • Total Posts : 6
  • Scores: 0
  • Reward points: 0
  • Joined: 2020/01/21 06:52:05
  • Status: offline
2020/01/21 07:12:52 (permalink)
0

Kawasaki fr691v carb question

I have a couple questions about one of the hoses on my carb setup for my fr691v. There is one hose that cones from the engine and attaches to the top behind the air filter tube my questions are
1. Is thos the crankcase vent hose
2. Does thos vent from the carb to the crankcase our from crankcase to the carb

8 Replies Related Threads

    glennander
    Starting Member
    • Total Posts : 6
    • Scores: 0
    • Reward points: 0
    • Joined: 2020/01/21 06:52:05
    • Status: offline
    Re: Kawasaki fr691v carb question 2020/01/21 07:19:28 (permalink)
    0
    Trying to upload a a picture but it gers stuck at 58%
    AVB
    Super Member
    • Total Posts : 1511
    • Scores: 57
    • Reward points: 0
    • Joined: 2017/06/21 16:35:48
    • Location: Elora, TN
    • Status: online
    Re: Kawasaki fr691v carb question 2020/01/21 07:22:48 (permalink)
    0
    It should be the Crankcase vent hose and vent the crankcase into the air cleaner so the engine can try to burn the blow by gases. It wasn't there these raw gases would vented to the atmosphere creating more pollution besides it helps the engine to be more fuel saving.
    glennander
    Starting Member
    • Total Posts : 6
    • Scores: 0
    • Reward points: 0
    • Joined: 2020/01/21 06:52:05
    • Status: offline
    Re: Kawasaki fr691v carb question 2020/01/21 07:27:26 (permalink)
    0
    AVB
    It should be the Crankcase vent hose and vent the crankcase into the air cleaner so the engine can try to burn the blow by gases. It wasn't there these raw gases would vented to the atmosphere creating more pollution besides it helps the engine to be more fuel saving.

    Ok thank you for answering now i have a few more questions
    If there was moisture in my crankcase would this hose vent moisture into my carb causing ir to ice in cold temps? I have found ice in this hose along with inside my carb and a white milky substance on the inside of my dipstick sleeve
    AVB
    Super Member
    • Total Posts : 1511
    • Scores: 57
    • Reward points: 0
    • Joined: 2017/06/21 16:35:48
    • Location: Elora, TN
    • Status: online
    Re: Kawasaki fr691v carb question 2020/01/21 07:28:10 (permalink)
    0
    glennander
    Trying to upload a a picture but it gers stuck at 58%

    Easier to use an image hosting site and post the URL here.
     
    glennander
    Starting Member
    • Total Posts : 6
    • Scores: 0
    • Reward points: 0
    • Joined: 2020/01/21 06:52:05
    • Status: offline
    Re: Kawasaki fr691v carb question 2020/01/21 07:29:49 (permalink)
    0
    AVB
    glennander
    Trying to upload a a picture but it gers stuck at 58%

    Easier to use an image hosting site and post the URL here.
     

    Ok ill do that one sec
    glennander
    Starting Member
    • Total Posts : 6
    • Scores: 0
    • Reward points: 0
    • Joined: 2020/01/21 06:52:05
    • Status: offline
    Re: Kawasaki fr691v carb question 2020/01/21 07:32:07 (permalink)
    0
    https://imgur.com/a/aZ3PQwp
    AVB
    Super Member
    • Total Posts : 1511
    • Scores: 57
    • Reward points: 0
    • Joined: 2017/06/21 16:35:48
    • Location: Elora, TN
    • Status: online
    Re: Kawasaki fr691v carb question 2020/01/21 07:51:36 (permalink)
    0
    glennander
    AVB
    It should be the Crankcase vent hose and vent the crankcase into the air cleaner so the engine can try to burn the blow by gases. It wasn't there these raw gases would vented to the atmosphere creating more pollution besides it helps the engine to be more fuel saving.

    Ok thank you for answering now i have a few more questions
    If there was moisture in my crankcase would this hose vent moisture into my carb causing ir to ice in cold temps? I have found ice in this hose along with inside my carb and a white milky substance on the inside of my dipstick sleeve

    Carb icing can occur at any temperature. It all depends on the amount of moist, air temp, and amount of pressure drop at carburetor. Personally I had a carburetor to ice over on the Piper Tomahawk plane I was flying at 90 F but normally it occurs the closer you get to the freezing point. Good thing they provide a way to heat the air before it enters the carburetor when this occurs or more planes would be crashing.
     
    To answer your question yes sounds like you got excessive moisture in the crankcase and it freezes in the vent line as it is vacuum line which lower the air pressure. As water or fuel vaporizes it has a cooling effect.
     
    One solution if you must operate in low temps is to provide some heat off the muffler to heat the intake air before it enters the carburetor. Many snowblower engines have this as a standard feature. But I think due the design of the air cleaner on this engine it going be a difficult to do. Talk to Kawasaki engine dealer to see if they have a solution.
     
     
    post edited by AVB - 2020/01/21 09:27:32
    glennander
    Starting Member
    • Total Posts : 6
    • Scores: 0
    • Reward points: 0
    • Joined: 2020/01/21 06:52:05
    • Status: offline
    Re: Kawasaki fr691v carb question 2020/01/21 07:54:55 (permalink)
    0
    Thank you for your replies
    Jump to:
    Copyright © 1994 - 2016 Jacks Small Engine & Generator Service, LLC