Other Stuff > Misc / Open

Crank repair

<< < (2/3) > >>

Moorey:
They are listing both half's crank and piston.

matthewmosse:
I'd just drop the old engine and drop another in. Not even necessarily even the same make or model engine. Same hp or similar. I recently swapped the engine on my mini digger from a Honda 5hp to a teschumench 10hp, basically because I found a tesumench 10hp engine on Ebay for £75 that was new old stock, more power seemed a smart move. Most of these stationary engines are fairly generic and a bit of fettlling to swap engines  can be way cheaper than doing engine work properly. Next up is dropping a diesel onto my grass mower in place of a worn old Kohler. Tesumench seems cheap engine and parts still seem to be around on Ebay, even if theres a wait for them to come from USA.

paulbaker1954:

--- Quote from: matthewmosse on May 07, 2021, 12:33:28 AM ---I'd just drop the old engine and drop another in. Not even necessarily even the same make or model engine. Same hp or similar. I recently swapped the engine on my mini digger from a Honda 5hp to a teschumench 10hp, basically because I found a tesumench 10hp engine on Ebay for £75 that was new old stock, more power seemed a smart move. Most of these stationary engines are fairly generic and a bit of fettlling to swap engines  can be way cheaper than doing engine work properly. Next up is dropping a diesel onto my grass mower in place of a worn old Kohler. Tesumench seems cheap engine and parts still seem to be around on Ebay, even if theres a wait for them to come from USA.

--- End quote ---

Sadly not so simple, this is a ride on mower and there is a fairly complex clutch etc that engages the blade. All this sits on the end of the crank so crank diameter, length key way etc are critical and unlikely to be right.

Just hoping a unit will pop up on eBay at some point.

paulbaker1954:
Ok now I know one of you clever people will help me with my next issue....

I have managed to source a crank (not the right one for this engine) that has the same gear pressed on.

My local shop will be able to press off the gear so I can use it to replace my broken one.

But now I have a conundrum.....

The cam timing on these engines is done by aligning a dimple on crank gear with a dimple on the camshaft gear.  The video here will be a big help explaining

https://youtu.be/aNGT5X6315Q

The problem is because the crank gear is not keyed on just a press fit I have no way of determine where the dimple should go.

So I will have to figure out a way to do the cam timing some other way.

My thought is to install the cam with the lobes furthest away from the valve lifters with the engine at TDC on the compression stroke with the magneto magnets lined up so I know this is the firing positions.

Any thoughts on my approach?

Bryanj:
Check it visualy, i suspect the dimple lines up with the crank pin I.E TDC

Navigation

[0] Message Index

[#] Next page

[*] Previous page