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Wish-I-Were-Fishn

Any reason NOT to use Amsoil

9 posts in this topic

Motor: 50hp Yamaha 2 stroke, 2002

Any reason NOT to switch to Amsoil (besides price)?

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In a 2-stroke engine (any: air or water cooled 2-stroke), no reason, even with a lot of hours. Only one potential trouble area - if it has heavy carbon build up (from using cheap, low-quality oils) it should be decarboned first. AMSOIL will clean existing carbon and if it is heavy it may break loose in chunks, hang in the exhaust port, burn a piston or scar the cylinder wall (this is rare but has happened).

And the price is not that high! Compared to low quality oils at walmart yes, but compared to quality oils like quicksilver or other manufacturer brand oils even at walmart AMSOIL 2-stroke is not that high. AMSOIL HP Injector

is only $23.60 Preferred Customer wholesale price per gallon.

For a high mileage car or truck 4-stroke engine there is a thread on this in the automotive forum now.

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im going to switch over to amsoil in my boat , i have a 05 yamaha 90 hsp - 4 stroke . should i go with 10-30 or 10-40 , what would be the diff ? thanks

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If your motor is new, use the specific oil recommended by the manufacturer and be sure you wait until after the break in period to switch over to any synthetic oil. The superior lubricity of the synthetic will hamper the seating on the rings and actually reduce the long term efficiency of the engine. Once the break in is complete make the switch.

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Don,

What is involved in Decarbing a motor?

Folke

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There are several techniques used by different shops. In my opinion the best job is done by pulling the head so you can clean properly. Some will use some kind of a hard nut shell to blast with and do it through the spark plug holes without pulling the head. The trick is to not get any foreign material through the ports and down in the lower end.

Any takes a competent mechanic. I have retired from all mechanic work over 10 years ago and have not kept up with the latest techniques.

The best - find a mechanic you trust. If you don't have one, ask here in the forum, someone should know of several good ones in your area.

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Many 4-stroke outboards now come with synthetics from the factory new. The requirement is FC-W certified which AMSOIL 4-stroke marine oils are. Which? Use the viscosity recommended by the manufacturer. The second number is always the most important. AMSOIL marine lubes are available in 10W-30 prod. code WCT and 10W-40 prod. code WCF.

The most common for outboards is 10W-30 and the most common for inboards is 10W-40.

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