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Shenanigans

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Posts: 42
Reply with quote  #1 
I had issues with cooling water pressure so I thought I'd modify the intake grill on my 2007 225HO ...it just looked like it wasn't very hydrodynamic. I've used a cone shaped conical tungsten burr of about 8mm diameter in a cordless drill. Took about 5 mins a side.
What a difference! An extra 5 psi at full speed, more pressure throughout the rev range. I'd recommend it if you have one of these early gearcases.

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Shenanigans

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Posts: 42
Reply with quote  #2 
Yes I did clean up the filings after this photo so they didn't end up in the cooling passages - and then primer and painted.
skidog

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Reply with quote  #3 
Very interesting and great idea. I have an old L1 that I use as spare. I love running it but it's always been a bit on lower edge of pressure range. Thanks for sharing.
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2006 225HO DHLSDF
Shenanigans

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Posts: 42
Reply with quote  #4 
You're welcome , I hope it works as well for you. I thought I must have had a problem with my water pump or the relief valve...or that was as good as I could expect and would have to watch my water pressure gauge all the time but I'm amazed at the difference.
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