trim cylinder leak

[oddysea1]

I have a 150h.p. 2000 Johnson with a trim cylinder leak.Im wondering how many gaskets are involved in the replacement repair.Is it a straight forward process or are there any challenges I should be aware of? Thank you Andy

 

[blockhead123]

If it is leaking where the electric motor mounts, it is just an o-ring. Remove the three screws, pull the motor off and push aside, clean up oil mess, clean surfaces, spray surfaces with starter fluid, or ether to remove oil, etc. Coat new o-ring with Permatex Aviation Form-A-Gasket, install o-ring and re-mount electric motor. Coat screws with gasket goop too, makes it easier next time. If it is leaking from the main seal around the middle / main strut, give it up. Take it to a shop to have that seal replaced. It requires a spanner wrench OMC tool. OR I can explain the full proceedure to you......If it is leaking from a hydraulic fitting just try tightening it up a hair.

 

[emdsapmgr]

You can check out the original factory exploded parts diagrams to see what you're getting into: epc.brp.com If one of the two trim cylinders are leaking, you may be able to replace parts without removing the whole trim assy-work on it in place. Most of the rubber seal parts are sold in a complete seal kit: 434519. If you need to remove the trim rod end caps, you can purchase/rent a spanner wrench which will unscrew it. (sold in automotive parts stores.) If you are somewhat handy, you can tackle it yourself. If it's the main tilt rod leaking, that's a bigger deal, as blockhead noted. You'll have to refill and bleed the system when it's back together. The original factory service manuals have a nice section on this trim unit overhaul.

 

[oddysea1]

Thank you for the information it appears that the leak is coming from the top of the trim cylinder cap only.I will go online and look a the diagram to see what is involved.I did this type of repair on my 200 h.p.1989 Yamaha and it was a simple fix with just replacing the o-rings in the cylinder caps, those o-rings were sold individually.I was a little taken back at the dealer after he showed me the bag of o-rings I needed to purchase.

 

[emdsapmgr]

The older style trim systems show many replacement parts in the oring kit. This later version does not really indicate/show any seal/oring parts. Considering the price differences, you may still be better off getting the whole oring/seal kit than just purchasing a new trim ram cap by itself. Likely the instructions with the kit will show a cap oring seal, a trim rod seal and a perhaps a trim rod wiper.