I want to say I'm at the end of my rope with this thing.
Belongs to my Uncle, 00 35hp 3cyl. Johnson, remote controls.
Originally bought engine from somewhere(Mich..??) On ebay. Was supposed to be freshwater engine. Mounted engine to boat, never used it. Ran
it with mufs etc..
All seemed fine pumped water out pee hole he said. This is where I come into the mix of things.
After a year of sitting due to health issues, he's back at ready to use it. He asks me to take a look at everything and make sure it's all good. We take it out for the first time and after 5 mins at the dock idling we head out, within 5 mins we try to accelerate and it revs slightly and bogs. We try a few more times and same thing. So turn around and head back to the dock. Total of 15-20min in the water. During this time I notice only the pee hole is spraying. There is no water coming out the other port next to it with exhaust.
Get it home, pull the hat and find the temp sensor(overheat sensor, what ever you call it) completely melted. So we install a impeller and housing, seals. Start it up and same thing only where from pee hole. We replaced temp sensor as well. We then pulled the thermostat out, which was slightly corroded but not extreme. We ran the engine with muffs and no thermostat cap or tstat, no water came out the thermostat cap hole. Seems like there is a restriction somewhere. Being that it sat unused for so long I suggested pulling the power head to confirm no dirt dobbers( wasps) made a nest or something dumb we cannot see in one of the passages. Everything looks clear.
I have searched online trying to find out on this engine if water comes out the exhaust port next to the pee port on back of the engine or not. If so I'm not getting any.
This year does not have a tube that runs up through the midsection from the top of the impeller housing into the lower portion of the power head for water flow. The impeller housing seal onto of the housing seems to crush fit the seal onto the midsection and supplies water to the power head by use of the midsection body. I haven't seen this before so I was a little confused. The old impeller that came out the housing seemed to be crushed, bent at the top.
When installing the lower unit the impeller housing stops the lower unit from going up all the way to meet the midsection. There's a good 1/2-9/16 gap before bolting it up tight. Seems to me that during this process the impeller housing is being crushed.
I visited a well known marine mechanic and told him what was going on. He said I have the right impeller and that's how that unit is, in terms of mounting the lower unit and fitment with the gap, until it's bolted up.
So long story..
Why am I not getting water out of the thermostat housing with cap off( I feel like this is why it melted the temp sensor and would not accelerate due to it over heating, kinda like limp mode)
And is it really normal for fitment as described between lower unit and midsection..
Engine otherwise runs ok, just runs hot from not getting water. Confused why it comes out pee hole but not the exhaust and nothing up inside the block. Also pulled the head, water jackets around cylinders are clear.
Any help greatly appreciated!!!!
Belongs to my Uncle, 00 35hp 3cyl. Johnson, remote controls.
Originally bought engine from somewhere(Mich..??) On ebay. Was supposed to be freshwater engine. Mounted engine to boat, never used it. Ran
it with mufs etc..All seemed fine pumped water out pee hole he said. This is where I come into the mix of things.
After a year of sitting due to health issues, he's back at ready to use it. He asks me to take a look at everything and make sure it's all good. We take it out for the first time and after 5 mins at the dock idling we head out, within 5 mins we try to accelerate and it revs slightly and bogs. We try a few more times and same thing. So turn around and head back to the dock. Total of 15-20min in the water. During this time I notice only the pee hole is spraying. There is no water coming out the other port next to it with exhaust.
Get it home, pull the hat and find the temp sensor(overheat sensor, what ever you call it) completely melted. So we install a impeller and housing, seals. Start it up and same thing only where from pee hole. We replaced temp sensor as well. We then pulled the thermostat out, which was slightly corroded but not extreme. We ran the engine with muffs and no thermostat cap or tstat, no water came out the thermostat cap hole. Seems like there is a restriction somewhere. Being that it sat unused for so long I suggested pulling the power head to confirm no dirt dobbers( wasps) made a nest or something dumb we cannot see in one of the passages. Everything looks clear.
I have searched online trying to find out on this engine if water comes out the exhaust port next to the pee port on back of the engine or not. If so I'm not getting any.
This year does not have a tube that runs up through the midsection from the top of the impeller housing into the lower portion of the power head for water flow. The impeller housing seal onto of the housing seems to crush fit the seal onto the midsection and supplies water to the power head by use of the midsection body. I haven't seen this before so I was a little confused. The old impeller that came out the housing seemed to be crushed, bent at the top.
When installing the lower unit the impeller housing stops the lower unit from going up all the way to meet the midsection. There's a good 1/2-9/16 gap before bolting it up tight. Seems to me that during this process the impeller housing is being crushed.
I visited a well known marine mechanic and told him what was going on. He said I have the right impeller and that's how that unit is, in terms of mounting the lower unit and fitment with the gap, until it's bolted up.
So long story..
Why am I not getting water out of the thermostat housing with cap off( I feel like this is why it melted the temp sensor and would not accelerate due to it over heating, kinda like limp mode)
And is it really normal for fitment as described between lower unit and midsection..
Engine otherwise runs ok, just runs hot from not getting water. Confused why it comes out pee hole but not the exhaust and nothing up inside the block. Also pulled the head, water jackets around cylinders are clear.
Any help greatly appreciated!!!!
