Logo
FULL SITE MENU

1988 gt150

T

trey915

New member
I have 2 questions

1) I just did some work on my lower unit but I don’t know if this was happening prior. But I have water coming out in front by the shift rod between the top and the exhaust. Water pressure and temps seem ok. Am I hurting anything?
2) I have a hydraulic jack plate and hydraulic steering. When the plate is all the way down if I trim it all the way up the steering cylinder hits the plate. Is there a trim limiter I can adjust and if so how or is there one I can install?
 
Starting in 1991 they started installing a tilt limit switch.---You might look into one of those.------It was handy as no tools were needed to adjust and set it for the desired limit.
 
I found the switch but have no idea how I would nor where I would install it. I looked this morning and realized that I can raise the motor one more hole on the jackplate. Once I did that I have enough room now to fully tilt / trim the motor in all positions with no interference and no risk of breaking another set of fittings.

But, what about question #1? Is it harmful to the motor for water to be coming out above the exhaust / mid section around where the shift rod is?
 
Here are a few pics to help. Also, I took a picture of the port side head where it’s white. I think that’s the poppet. Does it look burned?
 

Attachments

  • CE2993B6-3F2F-4047-9E53-13DD767E6571.jpeg
    CE2993B6-3F2F-4047-9E53-13DD767E6571.jpeg
    334.6 KB · Views: 56
  • 7CB26D10-C56E-4AAB-AC54-1B542335D5B9.jpeg
    7CB26D10-C56E-4AAB-AC54-1B542335D5B9.jpeg
    226.3 KB · Views: 51
  • 8B7E6DEF-2C9A-41A0-94D9-37E2C3AFDFBF.jpeg
    8B7E6DEF-2C9A-41A0-94D9-37E2C3AFDFBF.jpeg
    322.8 KB · Views: 54
That hole is a vent.----It allows the poppit valve diaphragm to move.------The white stuff may indicate that it is leaking.------And no do not plug that hole.----Have seen some folks plug that hole.
 
Is #61 the one that kind of looks like a hat and goes over the housing? If so, I know I put that on there but I’m not sure what #62 is unless that’s the driveshaft o-ring.
if water is climbing the driveshaft is that causing damage or is that decreasing the water going to the heads?
 
trey915 said:
Is #61 the one that kind of looks like a hat and goes over the housing? If so, I know I put that on there but I’m not sure what #62 is unless that’s the driveshaft o-ring.
if water is climbing the driveshaft is that causing damage or is that decreasing the water going to the heads?
Click to expand...
Did you check #61 sealing surface in midsection?
 
Thank you for all the help, by the way. :). I do want to clarify... are you saying the carbs may suck up the water or just generally speaking the carbs aren’t very good?
 
So, I am looking to pull the LU this next week but was looking at the parts diagram. Part 77 says it’s a shift rod seal but isn’t the seal in the housing. First of all, does my GT150 have that and if so where does it actually go?
3a7195d1-8e9d-425b-9713-22d9be4f3a4b
 

Attachments

  • Screenshot 2020-04-30 at 12.09.30 AM.png
    Screenshot 2020-04-30 at 12.09.30 AM.png
    810 KB · Views: 48
Last edited:
So it’s on the water tube that’s inside the midsection?

If that's missing could that be why the water is coming out up top by the shift rod (see pics above)?
 
Last edited:
??----Item 77 is NOT on a water tube.------Item 77 is just below the powerhead on the shift rod.----Item 77 has nothing to do with water leaking at the lower unit either !!
 
Back
Top