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-   -   Are the Merc 450s having any issues like prop shaft breakage (https://www.offshoreonly.com/forums/general-boating-discussion/373222-merc-450s-having-any-issues-like-prop-shaft-breakage.html)

Cash Bar 09-08-2021 05:57 PM

I ran a 34MTI w 450s about as hard as you can for the last 13 months. Had a bad O2 sensor and bought a $11,000 set of props, but no broken shafts. And loved every minute of it.
https://cimg2.ibsrv.net/gimg/www.off...18ce370b6c.png
https://cimg3.ibsrv.net/gimg/www.off...c12f9bfc2e.jpg

Double Rigged 09-08-2021 07:04 PM

Must have been the Driver! LOL

Drake22.250 09-09-2021 04:50 AM

Very Cool set up and pictures Cash Bar.

davidwademarine 09-09-2021 06:14 AM

I’ve handled a quad set of 450s that went over 2500 hours in a charter application with no problems. Also seen some snap driveshafts within 100 hours, but that’s on Freeman 47s that tip the scales at 35k pounds when fully loaded. This is especially bad on counter rotation lowers.

Sport cat applications were seeing some broken propshafts, but they’ve since been upgraded. They now have a hardened prop shaft in the SportMaster lowers and haven’t seen any failures with those. Some things are in the works to address the driveshaft and other issues they’ve seen happen in the field. We’ve been working directly with Racing’s engineering department on that. Stay tuned.

Cash Bar 09-09-2021 10:53 AM


Originally Posted by Double Rigged (Post 4804816)
Must have been the Driver! LOL

That is definitely how she will explain it. LOL

iliveonanisland 09-11-2021 05:37 AM


Originally Posted by speicher lane (Post 4804718)

i heard they are back ordered for 40 weeks on the 450s.

iliveonanisland 09-11-2021 05:39 AM


Originally Posted by Cash Bar (Post 4804805)
I ran a 34MTI w 450s about as hard as you can for the last 13 months. Had a bad O2 sensor and bought a $11,000 set of props, but no broken shafts. And loved every minute of it.
https://cimg2.ibsrv.net/gimg/www.off...18ce370b6c.png
https://cimg3.ibsrv.net/gimg/www.off...c12f9bfc2e.jpg

thanks for the info

iliveonanisland 09-11-2021 05:42 AM

Whats merc getting for the 450s? I saw one on eBay for 49,9k. The merc dealer in Colombia has never sold a 450 or 300R for that matter. Only have sold sea pros and the base model 300s so far.
I’m trying to find out who the merc rep is for Colombia South America

thanks for all the info guys.

obrien 09-11-2021 10:47 PM


Originally Posted by hogie roll (Post 4804767)
I thought they had the same LU as the 400? Why would parts for that be less available?

completely different lower

Apexwarrior 09-12-2021 05:48 AM

Ive got a 36’ Concept on order with twin 400’s. The 450’s are a $50k upgrade over the 400’s.


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