rattling noise and clunk when shifted in and out of gear

[cam4888]

hello i have a 50hp four str four cyl merc when it shifts in F it is fine but when put back to N the lower end rattles almost like something is loose but cant find the problem. also it does this in R. i disassembled the lower unit but everything looked ok. also does the shifter have to be in gear to put the lower unit back on i took it off in N (might have been a mistake but its a learning process)

 

[carholme]

Re: rattling noise and clunk when shifted in and out of gear

Cam;

What is the serial number of your engine. If it is a later s/n, we may be able to get you the service manual online.

As for the re-installation of the lower unit it calls for the boat controls and the LU to both be in neutral

Gerry

 

[Faztbullet]

Re: rattling noise and clunk when shifted in and out of gear

This is usually caused by prop not being torqued to spec's, the flo-torq and rubex replaceable hub props are bad about this. Tighten to 55ft/lbs UNLESS you have the FloTorq II with a bushing in the front in which case they spec 100ft/lbs....

 

[jimg984]

Re: rattling noise and clunk when shifted in and out of gear

for the rattlesound you may need to adjust shift linkage..........sounds like neural is a little off not much tho

 

[cam4888]

Re: rattling noise and clunk when shifted in and out of gear

thanks for all your help
it is a 2000
Model: 50elpt4s
Serial: ot118019
i dont know what a flo torq is but it has a nut on the shaft and then behind it there is another nut that is plastic

 

[cam4888]

Re: rattling noise and clunk when shifted in and out of gear

I did know about the shift linkage but not sure how to adjust it i was going to try it and i read about it but im not 100 percent on the terminology so its sort of confusing

 

[jimg984]

Re: rattling noise and clunk when shifted in and out of gear

sry,its the cable from the control lever to shift rod that goes down to lower unit.......with the engine running you can test this by pulling shift lever a little past netural toward reverse to see if the rattle stops.........if that stops the noise the cable needs to be adjusted out to make a little longer

 

[carholme]

Re: rattling noise and clunk when shifted in and out of gear

Cam;

Your engine comes up as a model number:

1F50452WD MERCURY 2000 50

Parts Listing:

http://www.crowleymarine.com/mercury-outboard/2853.cfm

Service Manual:

http://1manual.com/Mercury manuals/Service Manual PDFs/FourStroke/828631r3/cover.pdf

Scroll down to the bottom of the page and you will see the various sections of the engine which you can download to your computer or just read online.

Gerry

 

[cam4888]

Re: rattling noise and clunk when shifted in and out of gear

thanks for all your help

 

[cam4888]

Re: rattling noise and clunk when shifted in and out of gear

lll

 

[cam4888]

Re: rattling noise and clunk when shifted in and out of gear

ooo

 

[cam4888]

Re: rattling noise and clunk when shifted in and out of gear

thanks