F90 Overhead cam bore caps jam camshaft rotaion

[swain1972]

Hello,
I have picked up a 4stroke F115 that has a carb head installed. I am working on the head and find that the camshaft can bind when installing the camshaft bore caps. These caps can actually move when bolts are loose. I am used to either precision bolts or dowels used to locate the caps correctly. Is it normal for these caps to have such loose tolerances.
Thanks
Steve

[rodbolt17]

its how they are.
however they are numbered and MUST be installed in the correct spot or they wont fit the cam.
exhaust cam caps should have a pink stripe.
when installed the cap numbers are upside down.
if they are right side up then the cap is on incorrectly.
its all in the service manual you have.

[swain1972]

Yep caps are installed with numbers upside down and in proper location. Camshaft is straight.
Installed cam with no valves in to check bearing bore clearance. Just seems strange that I have to turn cam and slowly finger tighten caps to prevent binding. Maybe with the valves and springs installed that would help align the caps.
Bought this motor from a guy who got ripped off. Builder never meant for it to last over an hour. Severe corrosion in the water jacket with hole to the exhaust. 8 bent exhaust valves. He installed a carb head and used a plate adapter to install the Fuel Injection intake to the head.
Just trying to prove a point that you can fix something and not through it away. Seems no Machinist around here will even touch a outboard motor.100 hrs into the project so far.

[99yam40]

sounds like a waist of time