I picked up a yerf dog that had a seized 6.5 hp Tecumseh engine. I bought the harbor freight 6.5 predator engine. I have a couple of issues. The throttle doesn't really have a return spring on it but that is not a big deal. I can buy a spring, and attach it wherever I think. The big question is the old engine is 3/8" longer on the output shaft. I need to keep the spacer on the engine side of the clutch so the the clutch pulley lines up. That only leaves me with 3/8" of shaft left for the outer part of the clutch. The keyway works. The old engine only used 3/4" shaft. Is it enough? I cannot move the sprocket on the axle . Advise please. Thanks!!
Harbor freight engine swap
- Thread starter Avery
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Goat
Retired for the grandkids
If I understand you right 3/8 is enough. That's what I have on the junk yard dog.
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Goat
Retired for the grandkids
Post a picture of the clutch fully mounted so we can understand what you are concerned with.
mckutzy
Well-known member
The pred throttle plate needs to be loosened a bit(10mm socket) then it'll return...
As for the "clutch" you have... That is a cvt or TC as it is known...
More pics will tell for sure..
As for the "clutch" you have... That is a cvt or TC as it is known...
More pics will tell for sure..
Bbqjoe
Banned
Most engines nowadays only afford about a 1/4 inch for the TC driver on the driveshaft.
It looks awful, and it is, but it works.
We'd all feel better if the driver had more purchase on the driveshaft, but it's just not going to happen with the newer engines.
It looks awful, and it is, but it works.
We'd all feel better if the driver had more purchase on the driveshaft, but it's just not going to happen with the newer engines.
OzFab
Well-known member
That's interesting; most report the Predator shaft is longer... just saying...
Bbqjoe
Banned
I don't know if it will help any, but I just came across a phone number you might try to call to fix your problem. 888-389-5522
qtband
Well-known member
Cut the shaft from the old engine and use it as an extension to the HF shaft.
bob58o
SuckSqueezeBangBlow
I'm dying to know whose number you just put out there.
---------- Post added at 09:54 PM ---------- Previous post was at 09:53 PM ----------
Never mind. I thought I was excused from reading pictures.
Goat
Retired for the grandkids
Bbqjoe
Banned
So what I've figured out. I have access to a machine shop and what I did was make a bushing ( like cutting the end off the old shaft. Ill pick up a longer bolt today. I loosened the pivot for the throttle and it returns great now. I rotated the pull 180° . Hope to have it running tomorrow. Thanks for all the help!!
KartFab
Active member
Id run it as is just make sure the crank bolt is lock-tighted on there and let it rip
Panhead5496
New member
+1! All that rust is going to eat up your belt!!
Update!! Runs great. Doing spindles this week. Only problem left is the engine kill switch. It's a single wire and I grounded it like it was on the other engine but it doesn't work. I even grounded it with the engine kill switch ground and nothing. What am I doing wrong?
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