87 Suzuki 150hp?frozen up?

[wjob]

Stupid me! Didn?t try starting engine for 4/5 months and froze up on me. Last time I ran it at idle, in the dock, it was rough and hot warning came on so I shut her down. Have engine in tilt-up position (not completely horizontal, still angled slightly downward)) and poured lots of WD-40 in each cylinder but as I did so 3 of cylinders filled up as I would expect, but 3 didn?t, instead most of the WD-40 was running through engine and coming out down near bottom of lower unit, so I couldn?t fill those three? Does this make sense?

Also, noticed the starting motor gear is still engaged with the flywheel I guess from when I tried to kick her over and realized I had a problem. How can I disengage it? Assume I need to disengage it in order to be able to, hopefully, work the flywheel loose?

thanks
Bill

 

[wjob]

Re: 87 Suzuki 150hp?frozen up?

Stupid me! Didn?t try starting engine for 4/5 months and froze up on me. Last time I ran it at idle, in the dock, it was rough and hot warning came on so I shut her down. Have engine in tilt-up position (not completely horizontal, still angled slightly downward)) and poured lots of WD-40 in each cylinder but as I did so 3 of cylinders filled up as I would expect, but 3 didn?t, instead most of the WD-40 was running through engine and coming out down near bottom of lower unit, so I couldn?t fill those three? Does this make sense?

Also, noticed the starting motor gear is still engaged with the flywheel, I guess from when I tried to kick her over and realized I had a problem. How can I disengage it? Assume I need to disengage it in order to be able to, hopefully, work the flywheel loose?

thanks
Bill

Anybody have any suggestions?

 

[99yam40]

Re: 87 Suzuki 150hp?frozen up?

If you have rust in the cylinders,rings,or crank and bearings , just getting it to break free will not fix it.
Sounds like you will need to open it up and see what is wrong and then figure out what needs to be done to fix it.

 

[robert graham]

Re: 87 Suzuki 150hp?frozen up?

The starter drive gear on top of the starter motor bendix is spring loaded to return to the down/resting position, but if it won't go back down, then there are 2 large bolts holding the starter on that can be removed, but better unhook the battery terminals before messing around there. Then you can put a large socket on nut on top of flywheel and try to turn it. It also may be the lower unit/gearbox which is locked up, which would be a lot better/cheaper to fix than the entire powerhead. Did water get up into the cylinders/crank area to cause rust? Good luck and let us know what you find!

 

[99yam40]

Re: 87 Suzuki 150hp?frozen up?

It also may be the lower unit/gearbox which is locked up, which would be a lot better/cheaper to fix than the entire powerhead. Did water get up into the cylinders/crank area to cause rust? Good luck and let us know what you find!

Good thought on the lower unit

 

[wjob]

Re: 87 Suzuki 150hp?frozen up?

. Did water get up into the cylinders/crank area to cause rust? Good luck and let us know what you find!

I don?t know if water got in or not. I?m trying to determine that. As I said, with the motor tilted up, but still at a slight angle, I?m trying to load each cylinder with WD-40 but on 2 or 3 cylinders it just runs right thru, so not sure it?s doing much good? I?ve been doing this for a week and I still can?t budge the flywheel, at all. Isn?t easier to free the pistons before starting to disassemble?

Should my next step be to pull the engine off the boat and lay it down at an angle where the penetrant will fill each hole rather than running out of some? Before doing this, I could drop the lower unit to make sure that is not my problem and I don?t think it is. I think it?s bound pistons. Perhaps I should be using a different penetrant?

Appreciate the suggestions so far and will appreciate more on the above.

thanks

 

[99yam40]

Re: 87 Suzuki 150hp?frozen up?

drop the lower unit

If that does not free up motor then pull the heads and see what is going on inside the cylinders

 

[wjob]

Re: 87 Suzuki 150hp?frozen up?

Finally freed up engine by feeding it a lot of penetrant over several weeks and tenderly working it every couple of days while hitting my socket with a heavy hammer. It spins freely now when I hit the ignition.

That's the good news! Ran compression check and 5 checked out ok but one, lower right when standing behind the engine looking forward, doesn't want to hold a reading? The gauge needle starts up but then quickly falls back to 0? The hole immediately above reading 115 psi.

Thoughts/suggestions please.

thanks
Bill

 

[James R]

Re: 87 Suzuki 150hp?frozen up?

Hitting with a heavy hammer pretty well says it all. The damage is done. You have one cylinder shot and the rest are worn. You may have done the crankshaft. If water was in there it is almost certain that the crankshaft and bearings are shot.
Sorry to say but the only way to know is to strip the power head down.
Reboring and new pistons at a minimum. Crankshaft, if bad, used from Ebay.
Gaskets from brownspoint.com and labor from a knowledgeable outboard Tech.
Probably cheaper to find another motor.

 

[wjob]

Re: 87 Suzuki 150hp?frozen up?

Getting back to working on my engine. After sitting for a year, without being able to get it started, took another set of compression readings. Looking forward from behind the engine, the readings were 90 to 105 lbs except on the bottom holes on each bank, the one on the right was 65 and the left one was 75. After putting a lttle oil in the 65 lb hole it jumped up and held 90.

Cleaned the carbs and have good fuel flow to the carbs, squirting gas and/or starter fluid into the carbs gets it started for a few seconds, then it quits. When I cleaned the carbs forgot to remove the Pilot Screw and Pilot Jet, thus not cleaning them, on the second side of each carb. When I realized this omission allready had the carbs back on the engine and hoped this would not prevent it from starting? Did notice after trying to start it, after pulling those two bottom plugs, that the one from the 65 lb hole showed some moisture on the working end of the plug, the other one showed just a trace of moisture, the top two on either side were dry.

When I put my thumb over each open hole and turn the engine by hand can feel good pressure on the top two on each side and slightly less on the bottom two.

Suggestions please. Should the engine start based on this info?

thanks

 

[99yam40]

Re: 87 Suzuki 150hp?frozen up?

Do like James said and pull the motor apart. It Is in need of repair

 

[wjob]

Re: 87 Suzuki 150hp?frozen up?

Do like James said and pull the motor apart. It Is in need of repair

Read somewhere on this site that if it attempts to start after sqiuirting some fuel mix into the carbs, that it indicates a fuel problem? Before pulling it apart, would it make sense to remove exhaust plates so I can get a look at what's going on?

If I do pull it apart, can I leave the power head attached to the mid-section or do I need to remove the power head first? Suppose my problem is just a head gasket or some broken rings, can't I take care of that without removing the power head?

thanks for your help.

 

[wjob]

Re: 87 Suzuki 150hp?frozen up?

Read somewhere on this site that if it attempts to start after sqiuirting some fuel mix into the carbs, that it indicates a fuel problem? Before pulling it apart, would it make sense to remove exhaust plates so I can get a look at what's going on?

If I do pull it apart, can I leave the power head attached to the mid-section or do I need to remove the power head first? Suppose my problem is just a head gasket or some broken rings, can't I take care of that without removing the power head?

thanks for your help.

Can someone please answer the above questions?

 

[wjob]

Re: 87 Suzuki 150hp?frozen up?

"Read somewhere on this site that if it attempts to start after sqiuirting some fuel mix into the carbs, that it indicates a fuel problem? Before pulling it apart, would it make sense to remove exhaust plates so I can get a look at what's going on?

If I do pull it apart, can I leave the power head attached to the mid-section or do I need to remove the power head first? Suppose my problem is just a head gasket or some broken rings, can't I take care of that without removing the power head?"

Can someone please answer the above questions?

 

[James R]

Re: 87 Suzuki 150hp?frozen up?

I don't like to point this out and maybe I shouldn't but from what you have said so far you don't have a clue as to what you are doing.
I think that there is sufficient room to remove cylinder heads which will enable examination of the cylinders but the compressions you are stating are very poor.
To do a proper job on the motor it will have to be removed from the exhaust housing and mounted on a motor stand.
This motor has been used in saltwater I assume, therefore you can expect a lot of sheared bolts in the tear down. This is typical of Suzuki's used in salt.
I have a good crank shaft on the shelf should you get that far.
Probably better to find another motor.