| Author |
Message |
    
Josh Nickles
New member
Username: tanksmydog
Post Number: 1
Registered: 07-2009
| | Posted on Sunday, July 12, 2009 - 06:38 pm: | 
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I have a 1973 Merc 500 and recently brought it out of storage, I fired it up and with the help of a little starting fluid it was running good. BUT when I tried to went to make sure the prop was moving good, it would not move. It is not seized up or at least I dont think it is cause I can move it with my hand easily. I shut it down to check out the cables and when I started it up there was no water stream, before it was a strong water stream, now nothing. Shutting it down quickly I could find nothing obstructing the outlet or the hose leading to it. Whats going on? I have spent a lot of money rebuilding this outboard so far but have done nothing to the lower unit...is it the impeller or the water pump? Is it an easy fix? Cheap? I am hoping to do this myself as I have the Seloc Manual and am pretty good with my hands. |
Graham Lamb
Senior Member
Username: galamb
Post Number: 5625
Registered: 05-2007
| | Posted on Sunday, July 12, 2009 - 07:41 pm: |
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Starting fluid is really bad for a two stroke motor. The only way the motor gets oil is through the gas, and starting fluid doesn't contain any oil.
If this has been is storage you should have serviced the waterpump and changed the lower unit oil well before you tried to fire it up for the first time.
From what you describe you could be dealing with one problem or a couple of different problems.
Both the prop and the waterpump rely on the driveshaft to power them. That is the one common component which would result in neither of them working, but for that to be the cause it would have to either be separated from the crankshaft, or all the teeth would have to be stripped off (the latter would be really bad and expensive to repair, especially if the problem was on the crankshaft end of things).
So throw away your starting fluid, get ahold of a Selocs manual and pull the lower unit - then start investigating.... |
Josh Nickles
New member
Username: tanksmydog
Post Number: 2
Registered: 07-2009
| | Posted on Monday, July 13, 2009 - 10:04 pm: |
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How much is this repair? Where might I look for a drive shaft if this turns out to be the problem? |
Graham Lamb
Senior Member
Username: galamb
Post Number: 5635
Registered: 05-2007
| | Posted on Monday, July 13, 2009 - 11:06 pm: |
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If the crankshaft is chewed up the repair cost would be significantly more than the motor is worth.
but first things first - get the lower unit off and investigate... |
Josh Nickles
New member
Username: tanksmydog
Post Number: 3
Registered: 07-2009
| | Posted on Tuesday, July 14, 2009 - 10:15 pm: |
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driveshaft is all good!! So whats next to check? |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 6270
Registered: 09-2003
| | Posted on Wednesday, July 15, 2009 - 07:32 am: |
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Is that the lower unit that came with the motor? A short shaft LU on a long shaft motor would explain all this.
The length of the driveshaft from the top of the water pump housing to the fat end of the shaft should be around 20 1/2 inches. If it's a few inches less than that....
Jeff |
Josh Nickles
Member
Username: tanksmydog
Post Number: 5
Registered: 07-2009
| | Posted on Thursday, July 16, 2009 - 04:20 pm: |
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Driveshaft is right size so could it be the control cable and the impellor as the two culprits? |
