Merc 90 can anyone throw some details for me?

monkeydiver · 30 November 2011, 16:11

Hi all,
brought this from a boat that was damaged for "not a lot"! runs sweet but i dont know alot on it. Its an auto lube from the 80's i was told.
Any ideas? Are they any good?
Cheers

Boats&Outboards · 30 November 2011, 16:22

Nope they are rubbish - I will give you £700 for it :wink

Strong motors. Looks a tidy example. Usual things that fail are the engine mounts and tends to leak fluid from its main tilt ram. The scraper tends to come away from the seal end cap causing a weep when tilting up". The old 3 wire 3 ram system is quite hard to get hold of too

but yours looks like the single ram 2 wire so you'd good

Other than that they are powerful engines. I had the 80hp for yeas on a fishing boat and it never failed us!

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007

jezza2011 · 30 November 2011, 16:22

If its got an internal oil thank then its similar to mine. Oh its has from the piccys so not a auto blend ( external tank type ) but nice internal tank.
my 75 is still going strong 20 years on.
very good engine.
looks like mine a 1991 engine

If you dont want it i can take it off your hands LOL

monkeydiver · 30 November 2011, 16:54

Thanks for that info, hadn't intended to keep the engine as its the boat bits i was after and thought i could sell of all the bits i didnt want. Are they a bit heavy on fuel?

Jizm · 30 November 2011, 17:24

Quote:

Originally Posted by monkeydiver

Are they a bit heavy on fuel?

It's an outboard.....

monkeydiver · 30 November 2011, 17:34

Well, my Suzuki DF hardly touches the stuff !

Jizm · 30 November 2011, 17:37

Quote:

Originally Posted by monkeydiver

Well, my Suzuki DF hardly touches the stuff !

I'll re-phrase, it's a two smoke outboard from the eighties when fuel was £1 a gallon!

Boats&Outboards · 30 November 2011, 17:38

Quote:

Originally Posted by monkeydiver

Thanks for that info, hadn't intended to keep the engine as its the boat bits i was after and thought i could sell of all the bits i didnt want. Are they a bit heavy on fuel?

So do we have a deal then :whistling

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007

Boats&Outboards · 30 November 2011, 17:39

Quote:

Originally Posted by monkeydiver

Well, my Suzuki DF hardly touches the stuff !

But you'd pay £8,000 for one of those......

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007

Jizm · 30 November 2011, 17:41

Quote:

Originally Posted by Boats&Outboards

But you'd pay £8,000 for one of those......

and that's alot of fuel!

well it used to be......

Turbodiesel · 30 November 2011, 20:23

Brilliant engine! The MOD had and still have lots of these, some i have seen clocking up over 9000hrs.

Downhilldai · 30 November 2011, 20:41

These motors weren't favoured by the racing fraternity, due to the 1.3l Yams, Soozooks & Twatsoos being faster.

Check the compression on each cylinder - if they're all ok, then you should be able to sell it on, 'cos it could be cheap power for someone on a tight budget. Like all Mercs, their appearance stands the test of time very well, so it should look very presentable for a 20+ yo motor, when advertised for sale.

clydeoutboards · 30 November 2011, 20:56

Hi

there are a lot of bad ones around but that is due to age and hours on them and not a reflection of it being a bad engine.

There are also a lot spares as many were not serviced and not flushed out.

The only down side is as the amount they drink, but for cheap power and lots of it they are great value.

monkeydiver · 30 November 2011, 22:24

I think I will stick to my frugal 4 stroke but the 90 sounds the business! Fleabay should get it moved on at a fair price