Engine came to a abrupt stop

[br549dh]

Hello i am starting a new post my red lever problem was miner compared to this...
I was running my 1988 48 hp spl with new gas mixed 50 to one. The compression was 120 psi on both cyl the motor has bin sitting a year or two. Cleaned the carbs. had the engine running with water hooked up with a good stream coming out of the top pee hole. Every thing seemed fine with it running maybe a min. or less when i brought ti down to idle it stopped fast. When i went to restart it would not turn over. It would rotate back and forth but not all the way around .
Pulled the head and found table spoon full of dry alum. dust and chips in top cyl. Also some metal transfer on cyl wall . What happened and what do i do now

 

[Cofe]

Re: Engine came to a abrupt stop

Just curious.....did you put the motor in gear and rev it up while it was on water muffs?

 

[br549dh]

Re: Engine came to a abrupt stop

Yes

 

[dew2]

Re: Engine came to a abrupt stop

I think you just lost your motor,Never run above idle on the muffs,Overheated expanded seized.

 

[boobie]

Re: Engine came to a abrupt stop

I don't think you hurt it by running it the way you did. I think the problem was there before. If the mtr didn't have a prior prob it would have held together.

 

[br549dh]

Re: Engine came to a abrupt stop

I think you might be right i just did a google on running on muffs and its not good . I just screw up a perfectly good engine with ignorance .Is there any hope for it now . The only damage that i see is to the top piston what else may be shot?

 

[Damo 1]

Re: Engine came to a abrupt stop

Sounds like youve dropped a piston maybe two might need to get a couple of second hand pistons, rings and hone the bore.... Dfinately sounds like it's siezed :facepalm:

 

[Joe Reeves]

Re: Engine came to a abrupt stop

The engine may have been run for some time in the past with a fouled carburetor. This would have resulted in the cylinder related to the specific carburetor to run lean (improper fuel/oil mixture).

Running on a flushette at a speed over idle does not hurt any engine BUT it is best not to exceed 1800 rpm, and do not keep it at 1800 rpm for any length of time. This rpm mention is not the cause of your engine failure.

Unfortunately you are faced with a complete overhaul. The powerhead will need to be removed, completely torn down, all parts cleaned and inspected, faulty parts set aside and cost of same figured as close as possible to estimate a total cost of repairs. The block will also rerquire boring and honing at a machine shop.

 

[br549dh]

Re: Engine came to a abrupt stop

What do you think that might cost worst case ? And can take the power head off and send it some where for this work? The two shops I no around here do not impress me for that degree on work

 

[Cofe]

Re: Engine came to a abrupt stop

If you are wanting to keep yours and rebuild it later, or use it for parts, here is one on ebay that has been rebuilt. It is listed as buy it now, or make a offer. If you call him, make sure that power head will interchange with the power head you have. http://cgi.ebay.com/ebaymotors/JOHN...0357299QQptZBoatQ5fPartsQ5fAccessoriesQ5fGear

 

[br549dh]

Re: Engine came to a abrupt stop

No one is complety worthless..... They can be used as a bad exsample

 

[AlTn]

Re: Engine came to a abrupt stop

at least your sense of humor didn't seize..as Joe says...no telling how long this had been coming on...water under the bridge now