Mariner 40 Info and help required

[mattyharris1]

"Hi, I recently purchased an a

"Hi, I recently purchased an avon searider with a Mariner 40 on. After some initial trouble shooting and fiddling about, we have got it working fine and its such a great combo.

The engine serial is 40EM6E9S110388W. It has been converted from tiller to remotes at some point. I believe it is ex RNLI also as it has some markings on which im told mean this.

What im after is as much information on the engine (within reason of course!) as to how to keep it in tip top condition. Does the engine need any additional oil on top of the 2 stroke mix? If so, where does this go? There is a big bolt head on the rear of the engine which looks like it could be for oil but im not sure.

I hear of engines being "winterised". What does this entail?

As I said, the enigne and boat work fine and its quick - is there any way of tweaking this engine to get more from it?!

Any comments and help greatfully received.

Matt"

 

[galamb]

"Here's a bit for you Matt

"Here's a bit for you Matt.

Your motor is a 1989 Mariner built entirely by Yamaha for Mercury.

Aside from mixing your oil with the gas the only other place that has oil (which needs changing) is the lower unit gear oil.

There may be a couple of grease nipples on the bracket assembly which should be kept greased especially if you run in salt water and using a bit on the cable ends etc will also help. I generally use lithium grease for wheel bearings - but just about any type of grease is fine.

To winterize an engine (which is kinda an all encompassing term for preparing a motor when it won't be run for say more than 30 days), generally you will add stablizer to the gas and run the motor long enough to let it get through the system. You spray the powerhead down with fogging oil or even WD-40 if you can't get fogging oil - also, pull the plugs and spray a bit into each cylinder (keeps the cooties away while it's sitting and helps prevent rust).

Personally what I also do is change anything that needs changing - ie, spark plugs (once a year or every 100 hours), lower gear oil (every year or 100 hours), impeller/water pump seals (every 2-3 years) etc. That way when you are ready to use the motor you don't have to play around "getting it ready".

Since this motor is "new to you" you should grab yourself a Seloc's manual for "Mariners" of that vintage and give it a good dose of general maintenance.

I would change the plugs, impeller, gear oil and visually inspect all wires/hoses etc for frays, rot etc at a minimum..."