Water pump?

[Oregonbayliner]

So my grandpa just gave me his 89 bayliner with a 125 us marine engine. He took it out to the lake after it sitting for a year and an alarm started going off and then the engine shut down and he hasn't tried starting it again. I'm going to go out Saturday and work on it and see if it will start. I'm a mechanic and work on cars all day but not very familiar with 2 strokes. Any ideas?

 

[MickLovin]

First thing I would do is a compression test. Then if it is ok, change your impeller on your water pump and check your thermostat, but if you check your thermostat have a new gasket handy, as you will more than likely tear the old gasket when trying take the housing off, for that matter why not have a thermostat handy.

When doing your impeller, check the old one for damage or wear it may indicate the need for a new pump housing, but try just doing the impeller first.
Also check your lower unit oil just as a maintenance procedure, check your plugs to see what colour they are, normal running they should be brown/tan, if they have been running hot it may be white-ish grey.

 

[BlueFishCrisis]

What is the motor configuration? To get at the impeller, you need to remove the lower unit. There are 6 bolts that are exposed, and one that is hidden under the exhaust snout. You need to remove the exhaust snout bolt that is visible, and a hex head cap screw that is concealed in the narrow end. You will then be able to access the last bolt. In addition, you will need to disconnect the shift linkage in order to drop the unit.

The buzzer was likely the overheat alarm. When this sounds, you must shut off the motor immediately. It's not a good sign if the motor shut itself off. The cooling passages are likely blocked or the impeller is damaged. It is possible that the impeller was OK, but cracked and deteriorated, and running the boat caused it to fail and break into pieces, which then would be distributed through the cooling system blocking passages. When you remove the thermostat cover, you can backflush the motor from that point to try and dislodge any pieces or blockage.

 

[Oregonbayliner]

Thanks for the help guys. Is there any way to tell what water pump it is without pulling it apart? It's a 4cylinder twin carb outboard this boat has been running rich so hopefully there wasn't any damage done

 

[Oregonbayliner]

Also how do I know if it's a one piece drive shaft or a 2?

 

[jerryjerry05]

You have the serial# ?
The 2 piece was used on some of the 89's some used the 1 piece.
No way to tell until it's been removed.
The bigger/ 85/125/150 90/120/150early Forces and late Chryslers used the same impeller.
Then after the mid year/ 89 they changed to a pump with a stainless insert. Different impeller
Again you have to take it apart to know??

 

[Oregonbayliner]

Ok thanks I will get serial number tomorrow or saturday

 

[MickLovin]

You have the serial# ?
The 2 piece was used on some of the 89's some used the 1 piece.
No way to tell until it's been removed.
The bigger/ 85/125/150 90/120/150early Forces and late Chryslers used the same impeller.
Then after the mid year/ 89 they changed to a pump with a stainless insert. Different impeller
Again you have to take it apart to know??

Hey Jerryjerry, did the U.S Marine motors use a 2 piece to 1989, was it just the Chrysler that changed iafter 1978?

 

[Oregonbayliner]

Thanks guys! I just ordered parts and should have her back together next weekend. I started her and ran her for a second to make sure I wasn't going to be tossing money in the trash and she ran beautiful and I shut her off got the lower unit off and found pieces of the water pump and everything else looked great. I pulled the t-stat out and flushed water down from there. Can't wait to get her back in the water hoping I can make a run next weekend

 

[Oregonbayliner]

Ok and it didn't get as hot as I thought he shut it down before it shut down

 

[MickLovin]

Cool, good luck, regular maintenance to these old girls is all that is required.

 

[jerryjerry05]

They were all 1 piece till 89.