Mercury 1075, 850 and 1200 Pulley Issues....And the Solution
 

Looking after several Mercury 1075 and 850 boats on a full-time basis, we can say from experience that they are the best running, most reliable BIG power to ever go into a boat. That being said, there is a weak link: the pulleys. They sometimes fail. Have any board members ever had pulley issues?

We have created stronger pulleys that eliminate the issue on Merc 850. 1075's and 1200's and make the most reliable engines ever more reliable. We are ready to ship and they are extremely reasonable as preventative maintenence. Only $1250 per engine and ready to ship in blue or silver to match your engine.

705 487 7575

Raymond,

I've seen this many times. There's also been numerous issues with the spring loaded tesnsioners. The original motors had our heavy duty billet tensioners, but I think because of cost, they went with a cheaper Gates unit. Many of the race teams have installed our billet tensioner to rid of that issue.

Then, some have also had the issue with drive snouts failing, which we also have a fix for.

Pulley's look great!

The pulley bearings fail due to an overhung load. The original pulleys have two smaller 6203 bearings which only come half way through the pulley. This causes the belt which rides close to the outer edge to put tremendous stress on the outermost bearing.

We use three larger 6303 bearings, evening out the load distribution on the bearings. The kit includes one upper idler pulley and shaft, and two lower idler pulleys and shafts.

U guys gunna cum & do Boyne Thunder or not? Fess up Peter!!! My Buddy The "ICEMAN" is in!!!!:party-smiley-004:

Raymond, congrats on finding a great fix for a problem!! I hate to sound like bad gas but if this is truly such an issue with these motors that are an awesome addition to the Mercury lineup, why in the hxxx doesn't Mercury make this fix prior to customers paying the outlandish prices that they are charging for these motors??? Just curious because I know a lot of people love the turn-key aspect of these motors but with 50-75 hr rebuilds at $40-$50k and now pulleys that are not able to hold up to the awesome technology that they have created, come on!!!!!!! Once again, kudos to Mercury but let's get it right from the get-go!!!!!

Hammer,

I have no problem with what Mercury is doing. Nothing is perfect. It is not like the majority of engines are having pulley failures. It was just the weakest link. There always has to be one. Also, we are getting 100hrs out of 1075's almost every time. Retail for a rebuild is $22,800 and comes with a REAL warranty, backed by a multi-billion dollar company. As far as big bucks go, don't forget that the drives and transom assemblies cost less in a package when you are building a Mercury boat and that helps even out the pricing.

Tracy,

I want to so bad. I know Bob th Builder is coming over too. I don't know about the rest of the Canadian crew. There is a run in Montreal that weekend. That being said, I may come personally. I can't commit until closer to the date. I have to go to Europe a couple days later and I need to decide how much time I can be out of the office. BTW... Tell Preston I rode in Ice Man's sistership on the weekend. Anybody who owns one of those boats is a lucky guy.

Peter

Understand Dude, but keep it mind! Stay in touch, let me know if U can make it over & I can try 2 get U set up w/ a place 2 stay, etc!! will talk 2 Pres in a day or 2!! Tracy

Sounds like a nice fix. When are most guys rebuilding? I have about 65 hours on my 1075's. Was wondering when to send in for a rebuild, or what about just doing the tops first? Do you have any time estimate when the pulley's are going out. For ex, is it at 50 h ours, 125 hours, or 200 hours? I was out recently when 42 cig with 875's lost a belt, and problem is, when it happens, you are down. If the pulley's are a weak link, $2500 a pair isn't big bucks, compared to being broken down, and extending your engine life a fair amount.

We have seen pulley failures between 30 and 80 hours. Mercury's program is complete. They do not do partial or top end rebuilds. We send most of our engines in between 80-110 hours. The ones that go in before 100 hours are because of the end of the season and owners wanting fresh motors for the spring. Depending on how hard you run your boat, we recommend doing springs and lifters at around your 65 hour mark to push the 110 hour mark.

$1250 a set isn't a bad price - considering I spent over $700 for the bearings - then had the idler between the blowers spin a bearing and that pulley alone was over $600.

Good job guys! Next spring I'll probably upgrade the NorTech w/ this set up.

**

How about the 700's?

They look great. I'm glad you guys came up with these, it will save a lot of people a lot of headaches.
I personally an sick and tired of the "weak link" problems in these high dollar performance parts. Not to get into too many details but I have had problem after problem with "weak link" failures. I spent thousands on top of thousands for promise fixes. As soon as there is another failure it's due to another problem. which of coarse, there is an update for that too (at a cost). Nothing is under warranty when it comes to these issues. The poor sucker that put their faith and money into these companies, to be let down time and time again. It turns out that we are no more then the R & D department for these companies.
It's not only the cost of the part failure and replacement that is so frustrating. Theres nothing worse then trailering your boat thousands of miles, spending $10k to $15k on a poker run to have a failure that "You are the first one this happened too" and the entire weekend is ruined.
I have had this happen with some sea pumps a few years ago, some sea strainers and some water pick ups. Now I'm dealing with some other issues that i'm working with some people to eliminate. We'll talk about it another time.:ernaehrung004:
These companies have got to be held accountable. They build a product, charge big bucks for them and they simply don't hold up. I personally am tired of it!

Sorry!!! Really nice pulleys!:D

Good post...:ernaehrung004:

"Wow, this is the first time we have seen this happen":rolleyes:

I am the original R and D ginny pig for whipple.I have heard that "thats never happened before "story more times than i care to remember.Every time there is a update-i get a bill instead of full replacement for the defective parts.
Fortunatly i believe all of the gremlins have now been exorcised from my whipples.My spare parts kit that i haul to each poker run is unbelievable.

Much lower hp so really not much of an issue. Although we do rebuild the SC's, rear needle bearings should be replaced before 500 hours, preferably 300 hours.

Thanks

This thread has been quiet for awhile. How is this fix/kit holding up?
Any other options out there?

Thanks!

When I did the 1075 refresh in 09 I spent the money for their new pully design. The belt travels across the top rather then looping down and was supposed to be better.

30 hours into it I broke a top pulley. I think it was about a $2500 bill for the new pulley, belt, and the labor that it takes just to replace the belt. A lot of work for something so simple as putting a new belt and pulley on.

Ttt

Are you still in business and selling SC Pulleys for the 1075? I'm looking for some.

I need some Blue Ones, 1075 Center Pulleys. Mine are getting worn and won't hold the bearings very well.

15 years too late but good luck!!

It's the day after the first long weekend up here and Double R will be slammed with everyone wanting their boats prepped.

If you want the pulleys - Call or contact him directly b/c he likely has no have time to surf through OSO.

https://www.doublerperformance.com/contact-us

Alternatively, Whipple sells pulleys for the 850/1075/1200's

https://whipplesuperchargers.com/ind...product_id=508