Power-trim makes a loud skreeching noise when lowering engine. f150xb 4 stroke 2016 model. can you tell me what the problem is .thanks, gerald

They hide it and make it difficult to get to!

https://www.youtube.com/watch?v=-0QXQlB34i4

More here

https://www.google.com/search?q=2016+yamaha+f90+4-stroke+outboard+thermostat+replacement

..

This is a known issue with the motor and the dealer used to offer replacement under the warranty. If your unit is not too old they might still cover it. Contact the dealer.

Check valve adjustment.

Hi,
Here is a tip that I wrote about dryers and noises...

It will help you determine what is happening there...

Dryer Repair Squeaks, Grinding, Clicking and Knocking Noise


heatman101

Asker's Testimonial "That answer was very informative - thank you fortaking the time to educate me. " - teresa241964

Do you mix oil into the gas?? Is there a place to check the oil (a dip stick). Is there a special place to put 2 cycle oil for a self mixer?

If you don't mix the gas with oil and there is no special place to put 2 cycle oil, you have a 4 cycle engine.

If there is a place on the side to check the oil level, you have a 4 cycle engine.

Next question will be ... how do I check the transmission oil? If you have a 4 cycle engine, the engine oil is also the transmission oil ... rule of thumb.

You are showing a picture of a motorcycle and asking a question about a ATV, but not mentioning a model number. I don't think Yamaha is currently making a 2 stroke engine for their ATV's (there are several sizes - not including assorted models for sale around the world ... and I don't know where you are writing from (and please don't say).

Maybe the best thing for you to do is call the Yamaha dealer on Monday morning and tell them the model you have and ask the question 2 stroke or 4 stroke. There will be no more guessing on your part then.

Make sense?

Thanks for your question @ FixYa.com

just 1 more 4 stroke problem just a bunch of junk put on us by the greenies

I think the model your speaking of is the RBC30. It is a 2 stroke mixture. The 430 models are 4 stroke and do not require mixing oil and fuel. They are made by Ryobi for Makita.

Here is the RBC 30

RBC30SESA

• Powerful 30cc 2-Stroke Petrol Engine
• Easy-Start Carburettor
• Expand-It™ Attachments Compatible
• 18"/46cm Cutting Path Width
• 2 Year Domestic Warranty

Info on the 430

RYRBC430SES

• New 4 Stroke Design
• Light in Weight 7.3kg
• Safe Anti-kick Feature
• Reduced Noise Levels, Lower Emissions
• 2 Year Warranty

This is pretty much the entire line up of their brush cutters:

http://www.mowdirect.co.uk/acatalog/MowDIRECT_RYOBI_BRUSHCUTTERS___PETROL_STRIMMERS_311.html

There is not a 230 model.

Thanks for choosing FixYa.

Kelly

belt is probably off the drum. Take the back off and put the belt back on unless the pulley is bad then you can replace the pulley.

Changing the oil is simple procedure.
it more sound like you left some thing close to a moving part.
Check over the engine very carefully. Around the belt area, by the fan.

Try to pin point the noise and add more information. Then I will try to gave you a better answer.