Tips & Hints for serving a 2 stroke

The Hoff · 13 May 2013, 20:31

Hi All.
I could really do with some advice reference servicing a 1990 2 stroke Yam engine please.

After two years of being boatless and reading how much fun everyone else is having, I finally splashed a little cash and I mean little and got myself a RIB. (Happy as Larry!)

It's a 1990 Tornado with a 50hp Yamaha 2 stroke on the back. Now I know it's not the newest RIB but it's mint with one careful owner from new, seriously!

The engine is running well but on tick over it's running a little lumpy. Can anyone direct me where I can get an 'Idiots guide to servicing and outboard' or recommend a 'reasonably priced'
engineer near Bristol as i'm boating on a budget?

Thanks in advance
Andy

Nos4r2 · 13 May 2013, 22:43

What year is the Yam? Have a look on ebay,you should be able to get a CD manual for it for about a fiver.
Service is pretty simple.

Plugs, timing check (if it's even adjustable) lower unit gear oil (use new drain/fill plug gaskets EVERY time), new impeller, check freeplay in cable, grease every linkage you can, greasegun on every grease nipple.
Prop off, grease splines, replace.Use decent marine grease on everything.

Don't overgrease the driveshaft wher eit goes into the powerhead, and don't lose the key on the impeller shaft-it may fall out when you remove the impeller.

The Hoff · 13 May 2013, 22:56

Thanks Nos4r2 for the reply.
The Engine is 1990, fitted on the boat from new at Tornado. Its really clean under the hood but if i'm honest i'm no mechanic so the CD is a good suggestion. I can do plugs etc but i'm told the carbs might need setting up, whatever that intails?

Found a CD manual on ebay for £2.50 so i'll see if it's any good.
Thanks again.

Nos4r2 · 13 May 2013, 23:33

It should be-its probably the same one I have.

Read the manual-and be prepared to spend a good few quid on a set of vacuum gauges, or get someone else to do the carbs and do the rest yourself.

Nick Hearne · 14 May 2013, 10:20

I would suggest getting a mobile mechanic to give it a service then you can make him plenty of tea & watch what he dose & how!
This way you will have a good starting point knowing everything is working as it should & pick up loads of knowledge at the same time.

steco1958 · 14 May 2013, 12:12

Quote:

Originally Posted by Nick Hearne

I would suggest getting a mobile mechanic to give it a service then you can make him plenty of tea & watch what he dose & how!
This way you will have a good starting point knowing everything is working as it should & pick up loads of knowledge at the same time.

Good Call !!