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FROG 2.49 diesel Cox_ba12




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FROG 2.49 diesel

Cox Engines Forum  :: Engines :: Non-Cox Engines :: Diesel Engines

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FROG 2.49 diesel Empty FROG 2.49 diesel

Post  gcb Mon Apr 04, 2016 11:01 am

I always liked the looks of the FROG 2.49 BB diesel. I understand that the weak point is damage to the crankcase. Especially when that huge front bearing hits.
One I bought new in mid fifties (left), one from online auction (top), one from GSCB club sales (R) ...

FROG 2.49 diesel Frog2410  

FROG 2.49 diesel Frog2411

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FROG 2.49 diesel Empty Re: FROG 2.49 diesel

Post  ian1954 Mon Apr 04, 2016 5:37 pm

I have a couple of these and like the look of them. They are also exceptionally easy starters.

http://sceptreflight.net/Model%20Engine%20Tests/Frog%202.49%20BB%20Modified%20(2).html

As in the above review, they do get hot - very hot for a diesel but this never affected running and made it much easier for a restart.

I never came across any crankcase problems because of the bearing but I do know that a gummed up one is difficult to dismantle.

I was once given one of these because "the spring starter" was broken. The owner didn't realise that it didn't have a spring starter and that was the dust cover for the bearing he was looking at!

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