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03-18-2019, 03:06 PM | #1 |
Not Yet Wild
Join Date: Mar 2019
Posts: 12
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Plastic barrel and head cover
The plastic cover around the cylinder barrel and over the top of the head and spark plug.
Who leaves them on? Who leaves them off and why? |
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03-18-2019, 03:14 PM | #2 |
Gone Wild
Join Date: Jul 2017
Location: East Central Missouri
Posts: 1,955
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Re: Plastic barrel and head cover
If you are referring to parts of the shrouding those parts are there to force cooling air around the cylinder and head. Removing them would drastically reduce engine cooling efficiency.
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03-18-2019, 03:37 PM | #3 |
Gone Wild
Join Date: Jan 2017
Location: venice
Posts: 1,807
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Re: Plastic barrel and head cover
yea you'll melt one down in no time without them.
That being said I wonder why more air cooled engines did use this method? Yamaha has been using it since the 70's that I can tell on both carts and sleds. After looking at my Honda Oddyessy Fl250 project I wonder why Honda didn't use something like this, and on a motor know for over heating. |
03-18-2019, 05:13 PM | #4 |
Gone Wild
Join Date: Jul 2017
Location: East Central Missouri
Posts: 1,955
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Re: Plastic barrel and head cover
Equipment like carts need shrouding because they are either stationary like generators, or the engine isn't in a decent airstream like carts. The FL250 could have benefitted because they can be driven pretty slow too.
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03-19-2019, 01:21 PM | #5 |
Not Yet Wild
Join Date: Mar 2019
Posts: 12
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Re: Plastic barrel and head cover
Thanks folks. I was asking because I see lots of pictures of the engines on this forum but, I almost never see one with the shrouds in place.
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03-19-2019, 01:36 PM | #6 |
Gone Wild
Join Date: May 2011
Location: Pittsburgh
Posts: 2,945
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Re: Plastic barrel and head cover
Some engines have shrouds and some don't. It's all in the original engineering. One thing for sure is that if an engine was engineered to have a shroud then you want to make sure it's there.
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03-19-2019, 10:52 PM | #7 |
Gone Wild
Join Date: Jul 2017
Location: East Central Missouri
Posts: 1,955
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Re: Plastic barrel and head cover
I almost never see an engine on here without a shroud. Unless it is in some state of repair requiring removal of the shroud.
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03-20-2019, 05:07 AM | #8 |
Not Yet Wild
Join Date: Mar 2019
Posts: 12
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Re: Plastic barrel and head cover
Thanks again folks. I left mine on.
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03-20-2019, 10:46 AM | #9 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,682
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Re: Plastic barrel and head cover
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03-20-2019, 01:32 PM | #10 |
Gone Wild
Join Date: Jul 2017
Location: East Central Missouri
Posts: 1,955
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Re: Plastic barrel and head cover
Clone engines come with shrouds albeit sometimes marginal shrouding. They are primarily designed to replace powerplants on stationary or slow moving equipment which still requires some shrouding.
https://m.harborfreight.com/13-hp-42...not%20provided |
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