Yamaha 6HP stuck in reverse

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shanester

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Jul 19, 2009
87
Vandestadt & McGruer Sirius 21 #190 Dayton Ohio
I bought a 2005 Yamaha 6HP four stroke yesterday for $550. The reason for the lower price was it is stuck in reverse. The owner did not do mechanical work and would have to take it to a shop for repairs. He only had it for about a month and thought it did not have enough power for his boat so after the shifter malfunctioned on him bought a 9.9. I think it was a good deal as it is most likely something simple. The shifter moves back and forth just fine. The motor starts and runs great. All the shift linkage that is visible with the motor cover off looks to operate normal. I believe the lower unit must come off to fix this. Is there anything else to check for on this before I do this? Here is another clue: He stated that the guy he bought it from had just "gone through it". I asked and he said spark plugs, oil and could not remember what else. Maybe he replaced the water pump impeller and did not tighten something enough on the linkage.
 
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justsomeguy

justsomeguy

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Feb 20, 2011
8,060
Island Packet 35 Tucson, AZ/San Carlos, MX
Do you have a manual? And not an "owners" manual, a service manual.
 
S

shanester

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Jul 19, 2009
87
Vandestadt & McGruer Sirius 21 #190 Dayton Ohio
No but brings up something else. The aftermarket manuals do not appear to be that detailed because they cover so many models. I saw a review on the Seloc manual that covers my motor and one of the reviewers said that it did not show how to hook up the shift linkage. Isn't that perfect. The factory manual from Yamaha is a tad pricey at $79.00 plus shipping. I may go that route but was looking for ideas on how to fix it soon.
 
C

Chief RA

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Nov 26, 2012
2,315
Catalina 250 Bodega Bay CA
I think you have the right idea: just go ahead and drop the foot as it is not that difficult and bet you find out the problem. Good luck, Chief
 
justsomeguy

justsomeguy

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Feb 20, 2011
8,060
Island Packet 35 Tucson, AZ/San Carlos, MX
If it's anything like my Nissan, there's an access port on the side of the upper unit. Behind that little nylon cover is another control linkage which must be loosened to remove the lower unit.

Sounds like you got a great deal on that motor.
 
kloudie1

kloudie1

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Nov 6, 2006
10,093
Hunter 34 Mandeville Louisiana
if I remember correctly, that linkage has a little visible coupler that you can see in a notch a couple of inches above the anti-cavitation plate. but to hook it up does require the bottom foot to be dropped.. I think you got a keeper!.
 
Merlin Clark

Merlin Clark

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Oct 26, 2005
2,057
- - Satellite Beach, FL.
Check out the shift rod coupler (barrel) nut, part 12 in this link http://www.marineengine.com/parts/yamaha-outboard-parts/2005/6/F6MLHD/620350240018.
I think you'll have to unscrew the upper and lower shift rods to get the lower unit off, it should be accessible from the front side of the leg. There might be a rubber cover over it.
Could just be loose.
Once you get the foot off you can shift the f-n-r by pulling the rod up and down. With it in gear you'll see the drive shaft turning when you turn the prop. Check it in both forward and reverse.
 
S

shanester

.
Jul 19, 2009
87
Vandestadt & McGruer Sirius 21 #190 Dayton Ohio
If it's anything like my Nissan, there's an access port on the side of the upper unit. Behind that little nylon cover is another control linkage which must be loosened to remove the lower unit.
Click to expand
That is like my old Mariner but not this one.

if I remember correctly, that linkage has a little visible coupler that you can see in a notch a couple of inches above the anti-cavitation plate. but to hook it up does require the bottom foot to be dropped..
Click to expand
Check out the shift rod coupler (barrel) nut, part 12 in this link http://www.marineengine.com/parts/ya...D/620350240018.
I think you'll have to unscrew the upper and lower shift rods to get the lower unit off, it should be accessible from the front side of the leg. There might be a rubber cover over it.
Could just be loose.
Once you get the foot off you can shift the f-n-r by pulling the rod up and down. With it in gear you'll see the drive shaft turning when you turn the prop. Check it in both forward and reverse.
Click to expand
That is exactly what I found. No dropping the foot and no cover over it. I fixed it in less than 5 minutes including adjusting! Thanks guys. Now I think I got a really good deal on this motor. It is super quiet and the shifting will be so much easier with the shifter on the super long tiller.
 
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