What Gil risers do I need?
#1
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Joined: Dec 2019
Posts: 87
Likes: 5
From: Manistee
I am in the process of putting a Mercruiser 420 in my 88 Powerquest spectra xl 222. Dropped the motor in place tonight as spring is almost upon us in northern Mi. Not only are the risers I bought off Craigslist too long, they’re also too high. Anyone have any idea what risers I actually need? I’ve attached pictures of the ones I have. Part # 818495a1.

Thanks in advance!

Thanks in advance!
#3
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Joined: Mar 2012
Posts: 4,189
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From: Cape coral, FL
I went with these. Had to add a wedge but I have raised exhaust ports on my heads
https://www.cpperformance.com/p-1042...tailpipes.aspx
https://www.cpperformance.com/p-1042...tailpipes.aspx
#4
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Joined: Dec 2019
Posts: 87
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From: Manistee
I went with these. Had to add a wedge but I have raised exhaust ports on my heads
https://www.cpperformance.com/p-1042...tailpipes.aspx
https://www.cpperformance.com/p-1042...tailpipes.aspx
#6
The Merc 420's came with TRS drives and had a transmission, thus the reason they are too long and the wrong angle.
You need to find out if your exhaust holes in the transom are in the stock Bravo cutout location.
You need to find out if your exhaust holes in the transom are in the stock Bravo cutout location.






