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 Forum: TECH TALK   Topic: Merc 60 APX

 Post subject: Re: Merc 60 APX
Posted: March 5th, 2024, 6:53 am 

Replies: 9
Views: 502


If they made a proper engine that was lightweight and shortshaft I'd definitely be interested for my thundercat

 Forum: TECH TALK   Topic: Merc 60 APX

 Post subject: Re: Merc 60 APX
Posted: March 4th, 2024, 9:12 am 

Replies: 9
Views: 502


Tohatsu 60hp is 98.5kg, and thats in long shaft
https://www.tohatsu.com/marine/int/outb ... fs60a.html

 Forum: TECH TALK   Topic: Merc 60 APX

 Post subject: Re: Merc 60 APX
Posted: March 4th, 2024, 9:10 am 

Replies: 9
Views: 502


247 lbs? 112kg. Not what I would call lightweight, I don't think they're even trying. Tohatsu 20hp 4 stroke is 43kg, could almost have 3 of them and be the same weight as the merc 60. That's 3 gearboxes, legs, transom brackets etc. I'm sure if Mercury really wanted they could make a 60hp 4 stroke su...

 Forum: TECH TALK   Topic: o-rings vs. gasket for cyl head

Posted: February 25th, 2024, 11:44 am 

Replies: 3
Views: 268


The TSR head I ran on my tohatsu 50 kept leaking with the O rings, although I've had issues with bad head gaskets that were aftermarket never had issues with genuine Yamaha ones

 Forum: TECH TALK   Topic: What’s Happening With The 70CES Yamaha?

Posted: February 9th, 2024, 12:56 pm 

Replies: 15
Views: 1428


Would love to try a Yam 90 short on my thundercat. Always keep an eye out for cheap bits to put one together but they don't come up often.
In reality the 70ces I have now is more than enough power 99.9% of the time. Anything other than going for a speed record I don't even use full throttle

 Forum: PROPS FOR SALE   Topic: 13 spline cleavers

 Post subject: 13 spline cleavers
Posted: February 9th, 2024, 12:47 pm 

Replies: 0
Views: 803


Got a couple 13 spline cleavers for sale

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 Forum: TECH TALK   Topic: What’s Happening With The 70CES Yamaha?

Posted: January 22nd, 2024, 7:52 am 

Replies: 15
Views: 1428


Yep smallest cc top chamber then increasing towards the bottom. Have to say I'm not 100% on the port specs as Rolf did the porting work over in Norway. I was running to UIM spec, not any more as I have the 90hp carbs on and a few other trick bits like reed block stuffers. But over here they really d...

 Forum: TECH TALK   Topic: What’s Happening With The 70CES Yamaha?

Posted: January 22nd, 2024, 7:47 am 

Replies: 15
Views: 1428


Rolfs knowledge never ceased to amaze me, he hand't worked on a 70ces since the 90's but knew all the port specs, timings, flywheel weight even the resistance of the ignition coils under the flywheel to the nearest ohm. Was always grateful for how much time he gave me, think he could tell I was as p...

 Forum: TECH TALK   Topic: What’s Happening With The 70CES Yamaha?

Posted: January 18th, 2024, 3:34 pm 

Replies: 15
Views: 1428


Genuine Yamaha head gaskets are the only ones worth running. TSR use o rings which is a good concept but they're hopeless in practise, less than 10 hours on mine and water was getting into the head. TSR head is no good in my opinion. Have run the one piece, two piece, TSR head eventually got fed up ...

 Forum: PAST EVENTS   Topic: Marino Swing Cup...Boat Racing ...Finland

Posted: December 2nd, 2023, 5:52 am 

Replies: 3
Views: 5565


Some of the motors are pretty wild, the rules state the motor has to have the standard cowling but any mods under it are allowed
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