65 hp johnson runs good but sounds horrible 73' model

[joe79]

put it in the lake started up just fine but there was a nasty noise coming from it we didnt even notice till it setteld out for a min. and the power and everything picked up and sounded great then went right back to noisy and a lil sluggish, droped the foot and no obvious damage to the top of the drive shaft, any sugestions

 

[boobie]

Re: 65 hp johnson runs good but sounds horrible 73' model

Check the compression on it and then check the g/c oil for any metal shaveings. You could either have a p/h problem or g/c.

 

[joe79]

Re: 65 hp johnson runs good but sounds horrible 73' model

Compression was 135...135...125 and oil was clean, any suggestions on what bearings to check

Check the compression on it and then check the g/c oil for any metal shaveings. You could either have a p/h problem or g/c.

 

[DJ]

Re: 65 hp johnson runs good but sounds horrible 73' model

Any metal on any of the spark plugs? The 125 reading could be a fluke or the sign of things going.

Any metal on the lower unit drain plug?

 

[Joe Reeves]

Re: 65 hp johnson runs good but sounds horrible 73' model

What kind of noise..... Grinding, Slapping, Knocking?

(Piston Play Check)
(J. Reeves)

This procedure will tell you if there is any wear or play in the Wrist Pin, Wrist Pin Bearing, or Connecting Rod to Crankshaft area.

Remove the spark plugs. Insert a screwdriver, dowel, punch, or some object of your choice through the s/plug hole and into the cylinder/piston area. Hold the tool lightly against the top of the piston. Turn the flywheel by hand, bringing the piston up to top dead center, then continue turning the flywheel to pull the piston down about a inch..... all the while holding the tool lightly against the piston top.

Now, at the point whereas the piston has been dropped down about a inch, grab the flywheel and hold it firmly. Now, push that tool solidly and firmly against the piston top.

If the piston moves without moving the flywheel, there is a problem (wear, play, clearance, etc) somewhere with the items mention in the first sentence. Be sure to check all of the pistons/cylinders.

 

[joe79]

Re: 65 hp johnson runs good but sounds horrible 73' model

What kind of noise..... Grinding, Slapping, Knocking?

(Piston Play Check)
(J. Reeves)

This procedure will tell you if there is any wear or play in the Wrist Pin, Wrist Pin Bearing, or Connecting Rod to Crankshaft area.

Remove the spark plugs. Insert a screwdriver, dowel, punch, or some object of your choice through the s/plug hole and into the cylinder/piston area. Hold the tool lightly against the top of the piston. Turn the flywheel by hand, bringing the piston up to top dead center, then continue turning the flywheel to pull the piston down about a inch..... all the while holding the tool lightly against the piston top.

Now, at the point whereas the piston has been dropped down about a inch, grab the flywheel and hold it firmly. Now, push that tool solidly and firmly against the piston top.

If the piston moves without moving the flywheel, there is a problem (wear, play, clearance, etc) somewhere with the items mention in the first sentence. Be sure to check all of the pistons/cylinders.

Thanks for the tip I will tryit today and let you know what I find, and to nswer your question it seemed to be more of a rattle than a grind or slap, I was gonna hook up the hose and run it today with a mechanics stethascope to try to localize the noise, ill let you know what I find

 

[joe79]

Re: 65 hp johnson runs good but sounds horrible 73' model

the fly wheel ended up being loose and reemed everything out now keeps sheering the sheer key have moved on and donated to a family member who plans on putting a crank in it