Tecumseh OHV vs flathead bolt pattern - Snowblower Forum : Snow Blower Forums
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post #1 of 12 Old 11-25-2018, 10:49 AM Thread Starter
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Tecumseh OHV vs flathead bolt pattern

Just picked up a 11526 to repair with a 11.5hp OHV Tec on it and so far engine seems pretty locked up, Wondered if the mounting bolt pattern was the same as the flat head as I may be putting a new engine if I can not get this one to run, Depending on how much it cost to repair they may just sell it to me for parts but it's in really good shape so hoping I can get it repaired. Any one know if the mounting holes are the same?

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post #2 of 12 Old 11-25-2018, 11:01 AM
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as far as i know most engines like this use the same bolt pattern and really worst case scenario if the holes were not the same it is really not that hard to drill some new holes where you need them in the body to bolt the new engine down.

have you tried putting some atf/acetone or marvel mystery oil down the cylinder and made sure the crank case has oil in it?

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post #3 of 12 Old 11-25-2018, 11:14 AM Thread Starter
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Just got it home and raining pretty good so havenít done much, Did make sure there was oil and planes on lubing the piston to see if I could free it up, But was covering bases, Priced a 414cc winter engine just to see and $360 plus labor, Although this machine in in excellent shape they may or may not want to spend that on a old machine.

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post #4 of 12 Old 11-25-2018, 11:22 AM
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it is the same olt pattern the crank is about .4 inches shorter in height on the ohv
318cc 358cc flatty 4.59

ohv318cc 4.17
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post #5 of 12 Old 11-25-2018, 11:29 AM
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ya replacing an engine with a proper winter engine is not cheap and most people probably wouldn't go for that option. when you do try to free the engine up it is sometimes easier if you remove the belts and work on it from that side of the engine because generally the piston will break free easier 1 way than it might the other. once it breaks free it will likely be good but definitely want to make sure to keep the cylinder lubed.

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post #6 of 12 Old 11-25-2018, 11:42 AM Thread Starter
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Thanks 1132le very helpful info, crazzywolfie what I have done in the past is pull off the pull started and use a breaker bar going back and forth with the cylinder with a good amount of oil in it, After it frees up (Or if it does) I will hit the electric start with no plug to clear out the excess oil, I have done this on a few engines I have had been told they were seized and both freed up and one I know the new owner and never a issue, The other I ran for a few hours run time and it kept on going without issue so it was sold. This however is a larger engine so hoping it frees up.

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post #7 of 12 Old 11-25-2018, 12:00 PM
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tec pdf has just about everything


http://www.smallenginesuppliers.com/...e-drawings.pdf
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post #8 of 12 Old 11-25-2018, 12:07 PM Thread Starter
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Thanks for that, Will bookmark that site for sure, Now just hope the rain clears and I get to play with this thing a little more, Garage is a little over filled LOL so have to move stuff outside to work until I sell a few more.

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post #9 of 12 Old 11-25-2018, 12:21 PM
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Good luck freeing it up! I've never had a seized-up engine. But if a breaker-bar wouldn't do it, I wonder if you could pull the head, put a piece of wood on the piston, and hit the piece of wood? It would ideally be in the mid-point of the stroke. This would be a terrible method if it was at the top or bottom of the stroke, of course.

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post #10 of 12 Old 11-25-2018, 12:27 PM Thread Starter
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I'm pretty sure it's just locked due to sitting and no oil in the cylinder as the owner DID say this happened after it sat and first start of the year, She told me the start rope pulled but got harder to pull and just stopped, Just hope no ring damage as I don't rebuild engines unless for myself.

Sno-Tek Modded, 15"X-Track tires (Now has same X-Track tires but 13"x4" for better fit), 254cc engine LED light and hand warmers.
Snapper 6/22 sold but not forgotten. Was my first.
Ariens ST1027LE workhorse and going strong.
New 2017 Ariens Deluxe completely rebuilt after losing a fight with a forklift.
Dauntae is online now  
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