Compression differences Ocean Pro 175 1994-model

[bob johnson]

???-------That is your way and I start them my way !

I wasn't doing it that way when I first got the motor and I had cold start issues, then someone posted here that you were supposed to push and hold the key for an 8 second count prior to cranking the starter over!!...so I did it that way and its worked....

bob

 

[racerone]

8 years is not a long time -------I have started these motors with electric primers since when they first came out in 1980

 

[CatTwentyTwo]

But can anyone tell me the function of the small rings on the wholes in the intake manifold? Please see the picture I attached yesterday? (#12)some are loose, others not.

 

[reiddo1]

Any further progress on getting this engine restarted?

 

[ondarvr]

When the motor is cranking the fuel pump provides the PRESSURE.------------Many folks mistakenly push the key in for a count of 10 before cranking.

???????-----!!!!!!! MIstake ???????---- Not so much???????

??????? There are some people that just can't get over the FACT that pushing the key in prior to cranking helps on some (maybe most) motors. !!!!!!!!!!

So since I've been using primer systems on 2 strokes for a couple of decades longer than you, does that make me more "right" in this situation.

These were standard on european motorcycles form early on and continued into the 70's, when they switched to a choke lever, which was an enrichment circuit

The correct method was to push the primer button down and hold it for a couple of seconds before trying to start the motor.

The exaggerated punctuation was to indicate how rude it is in a response, I didn't really like doing doing it, and probably shouldn't have.

 

[ondarvr]

But can anyone tell me the function of the small rings on the wholes in the intake manifold? Please see the picture I attached yesterday? (#12)some are loose, others not.

I don't know exactly what their function is, so no help there. As for the compression numbers, guages can read very different from one another, so you could do the test again with another guage and it could be at 110 PSI, being even is more important.

 

[jwellcraft]

The small rings in the intake manifold are check valves.

 

[Andrik]

Any further progress on getting this engine restarted?

Hi again

Yes, it fired up after overhauling the carbs. But I realized there were no cooling water at all coming out...

Took off the lower unit to install new waterpump, but then realized that there were too much play upwards in the driveshaft. More than 2 mm. Will have a mechanic to look at it.

Meanwhile I have bought an 150 ocean pro 1998 with ignition trouble, but it seems to be in good shape. Probably I will try to fix both. Will start a new thread on the ignition problem.

 

[Andrik]

The small rings in the intake manifold are check valves.

Thanks. Regarding the check valves in the manifold; what are the function of these? Should they be loose, or "stuck" in the manifold?

 

[racerone]

The driveshaft is shimmed with a special tool-------Most might argue but that play is quite normal on those.----------It would be easy to inspect the upper thrust bearing under the water pump to put your mind at ease.

 

[reiddo1]

Hi again

Yes, it fired up after overhauling the carbs. But I realized there were no cooling water at all coming out...

Took off the lower unit to install new waterpump, but then realized that there were too much play upwards in the driveshaft. More than 2 mm. Will have a mechanic to look at it.
Did you start the engine while hooked up to a water hose? With that arrangement the water pump often takes a while to circulate water around the engine. On the hose, mine takes up to 30 seconds to circulate water on a cold start but with the boat launched in the water circulation begins upon startup.
Meanwhile I have bought an 150 ocean pro 1998 with ignition trouble, but it seems to be in good shape.

 

[Andrik]

Hi again

Yes, it fired up after overhauling the carbs. But I realized there were no cooling water at all coming out...

Took off the lower unit to install new waterpump, but then realized that there were too much play upwards in the driveshaft. More than 2 mm. Will have a mechanic to look at it.
Did you start the engine while hooked up to a water hose? With that arrangement the water pump often takes a while to circulate water around the engine. On the hose, mine takes up to 30 seconds to circulate water on a cold start but with the boat launched in the water circulation begins upon startup.
Meanwhile I have bought an 150 ocean pro 1998 with ignition trouble, but it seems to be in good shape.

No, I used water-cups around the water intake, connected to a water hose. I think the water should have come at once?

 

[reiddo1]

On mine with that hookup there is often a delay of up to 30 seconds before I see water coming out of the "tell tale". When the boat is launched I see water from the "tell tale" immediately after the engine starts.

 

[Andrik]

On mine with that hookup there is often a delay of up to 30 seconds before I see water coming out of the "tell tale". When the boat is launched I see water from the "tell tale" immediately after the engine starts.

Ok, thanks. That could possibly be the reason. I will certainly have that in mind when I restart it.

 

[Andrik]

The driveshaft is shimmed with a special tool-------Most might argue but that play is quite normal on those.----------It would be easy to inspect the upper thrust bearing under the water pump to put your mind at ease.

I have just opened up to inspect the upper thrust bearing. I am not afraid of the play sideways, but upwards. The bearing seems to be in good shape, can I do anything to test it? Please see this video that I have posted on youtube to see the play. Upwards I will suggest it to be a couple of millimetres.

 

[Faztbullet]

100% fine as it has a 2 piece driveshaft. Replace the top seals ands reassemble and go boating...

 

[Andrik]

100% fine as it has a 2 piece driveshaft. Replace the top seals ands reassemble and go boating...

Thanks, I will do.

 

[racerone]

???---Have you removed the shims and bearing washer to actually inspect the thrust bearing ??

 

[Andrik]

???---Have you removed the shims and bearing washer to actually inspect the thrust bearing ??

Yes, thats right.