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97 150 fast strike kicks up in reverse

H

hankgun

New member
engine kicks up in reverse (getting off trailer) and if it is tilted all the way up it will not come down unless the release valve is opened. If it is tilted to just before full up, it comes down OK.

I know the problem is in the valve body somewhere. are these units repairable? I read somewhere that they are not.
 
I need to ask.....

Is the fluid reservoir filled to overflowing with the engine to its full Tilted Up position?

Use care NOT TO remove the reservoir fill screw UNLESS the engine is at the full tilt up position.

Proper filling procedure: In up position, fill reservoir to overflowing. Replace fill screw/seal screw, lower engine,raise it, repeat fill process until no air exists in reservoir at the full tilt up position.
 
hankgun said:
Yes, it is full. That is the first thing I checked.
Click to expand...

Okay... I sort of figured that check was #1 on your list. I retired in 1991 so your unit may be foreign to me, however, is your unit the same as in past years... that is, the type that has two trim rams and one center located tilt tilt cylinder? If so, I'd suspect a sticking shuttle valve... the visible removable one facing you on the rear port side when the engine is tilted up... Brass shuttle, O Ring on it, Spring on each end.

One other thing (Columbo!)..... The oil pump has two very small ball bearing type check valves in the top portion of it. I have encountered your problem exactly as you explain it and found that when full up is reached, the oil pressure exerted caused one of those balls to stick momentarily... then after several minutes (or less), the pressure equalized with the result being that the down mode functioned normally once again... something one could live with perhaps if this is a known problem.
 
This is the same engine and tilt system as my 91 Johnson (less the thin water jacket on #1 cyl). Does the shuttle valve have anything to do with the engine kicking up in reverse? That is the problem I am more concerned with. I included the "not pumping down" issue because in the diagnostic chart that I have these 2 problems share the same item...a faulty valve in the valve body.

Thank for taking the time to answer. I am learning some good stuff.
 
hankgun said:
This is the same engine and tilt system as my 91 Johnson (less the thin water jacket on #1 cyl). Does the shuttle valve have anything to do with the engine kicking up in reverse? That is the problem I am more concerned with. I included the "not pumping down" issue because in the diagnostic chart that I have these 2 problems share the same item...a faulty valve in the valve body. Thank for taking the time to answer. I am learning some good stuff.
Click to expand...

The shuttle valve's actual name is the "Pump Control Piston". You can see if it stuck in either position, the fluid would have a free flow which might allow the engine to tilt up in reverse. Of course studying the other valves, you can figure the effect if they proved faulty.
PTT_HYDRAULICS-1_zps6854a38f.jpg

PTT_HYDRAULICS-2_zps1a60ee27.jpg
 
You should have the Showa Fasttrac trim......It doesn't work like above (old system) as all the valves/shuttles are in the pump body under trim motor. Usually this problem is a damaged manual release valve. If this don't fixit you can buy a used trim cheaper than the pump assy.This trim used on Johnrudes,Suzukis,Yamaha and Honda.
 
I have a lot of checking to do using all of y'alls good info. Unfortunately, with the outside temp being 28 degrees until end of the week it's gonna have to wait until it warms up a little. Luckily in Central Texas this weather doesn't last long. I'll post again.
 
hankgun said:
I have a lot of checking to do using all of y'alls good info. Unfortunately, with the outside temp being 28 degrees until end of the week it's gonna have to wait until it warms up a little. Luckily in Central Texas this weather doesn't last long. I'll post again.
Click to expand...

Understood.... My son lives 65m north of Dallas and sent me a email that he prefers my temperatures (few miles E of Tampa), however at 40 degrees here, I'm freezing my a$$ off!
 
OK...back to this problem. Engine model number is J150GLEUE I tried to insert a pic but I guess I'm not smart enough to do that. I have 2 trim rams and a center ram that is connected to the engine. The pump motor is on the port side and the fill reservoir on the starboard side. Release valve on port side.

Am I right that the engine needs to be blocked up, remove the snap ring from the release valve and then remove the valve?
 
(Am I right that the engine needs to be blocked up, remove the snap ring from the release valve and then remove the valve?)

If you're speaking of the manual release valve.... Yep.
 
long story short...there was an o-ring on the manual release valve that was leaking. I have been busy fishing and with family things and did t make time to address this further since January.

Thanks to all that offered advice. Much appreciated. You are very kind to share your knowledge.
 
I have the same problem. Does the valve have to be removed, or is the o ring replaceable by backing out the screw? Sorry if this is a dumb question, but I haven't taken a close look at it yet.
Just answered my question by looking at the parts list, I see that the o rings are on the valve body. So, remove the retaining ring, and unscrew the valve out of the body. Where did you find the replacement o rings? And is there fluid loss, so I need to have enough on hand to top up afterwards?
 
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My mechanic did the work so I am not 100% sure. I believe that the motor is raised all the way up & blocked so it doesn't come down when the release valve is removed. I don't know how much if any fluid is lost. The o ring was in a seal kit. Had to buy the $80.00 kit to get the o ring.

Maybe joereeves will add some info
 
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