Increased effort to pull starter rope after rebuild

[skanders01]

Finally finished reassembly of my three CD-11’s. They seemed somewhat hard to pull once I had the stater assemblies installed, at least harder than a fourth that I did not touch….yet. I was curious so I removed the starter assemblies and measured the amount of torque needed to rotate the flywheel. Torque measured out at 4, 5, & 6 foot pounds respectively. I checked the fourth motor motor it pulled easier and it torqued out at 3 ft-lbs. to rotate. Not sure what to have expected from a complete teardown, new rings, seals, etc. and reassembly, but would have thought they wouldn’t pull start so hard. Powerhead reassembly went OK, and crankcase turned turned relatively easily. I did put some oil in the cylinders before pulling the starter ropes.

Have not put oil in gearcase nor any fuel through it yet. Are there any red flags out there serious enough that would warrant aborting filling gearcases and trying to run them?

Anyone else notice increased effort to pull start after a rebuild? Thanks for any thoughts on the matter.

Thanks,

Kyle Anderson
Trempeleau, WI
skanders@triwest.net
920-764-0501

[garry-in-michigan]

They usually get easier to pull after 3 or 4 hours of easy break in time. I always use a little extra oil in the first tank. . . 🙂

[PugetSoundBoater]

If you did all 3 motors at the same time,did you keep the 3 individual motor crankcase halves grouped separately ,motor#1 ,motor#2 motor#3 during the rebuild, not mixing them motor to motor on reassembly ? As i understand the machine process, the blocks are assembled ,bored for the cranks, then assembled, due to slight variations in the castings .
The thread started recently about gear case halves mixed and matched makes me think of this potential issue.
Did you resurface the crankcase halves mating surfaces? That would really cause a greater resistance than what you have told of here though.
I would go ahead and fill the gear cases also.
EDIT for clarity

"Some people want to know how a watch works, others just want to know what time it is"
Robbie Robertson

[frankr]

I hope you didn’t resurface the crankcase. If you did, you will have to line-ream the main bearings.

—–OR—-

Did you install the two taper pins before installing the crankcase bolts? If not, the main bearing halves may not be aligned at the seam.

[Buccaneer]

Assuming you installed new impellers, I’d think that would
also make it stiffer pulling for a while.

Prepare to be boarded!

[wbeaton]

quote Buccaneer:

Assuming you installed new impellers, I’d think that would
also make it stiffer pulling for a while.

I’ve had that issue with Sierra impellers before. I only use BRP impellers now.

Wayne
Upper Canada Chapter

uccaomci.com

[amuller]

How much did the compression increase? In general one would hope for and expect higher compression after a rebuild. The motor being tight because of case misalignment or similar is another story. Does it turn freely with the plugs out?

[sydinnj]

If no oil was used on the assemblies or the rebuilds, a clean dry motor is going to be harder to turn over

[Author]

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